What would you do with $150 million? That's the situation Barack Obama has found himself in after raising a record amount of money in September, and he's coming up with some clever ways to reach voters. Everything from his 30-minute prime-time ad buy slated for Oct. 29 to his unprecedented outreach to video gamers has put the senator in a league of his own.

What other uncharted territory could be tapped as avenues for political advertising? NationalJournal.com staffers asked this question to various political ad experts, tech and online-savvy consultants for speculation. Contributors include Tihan Presbie, co-founder of Miniclip.com; Sabrina L. Sutherland, marketing coordinator of RealNetworks; Paul Freedman, University of Virginia professor and political advertising expert; Jeanne Jennings, founder of e-mail marketing firm JeanneJennings.com; Lee Gibbons, co-founder and CEO of Podango; John Geer, Vanderbilt professor and political ad expert; Daljit Bhurji, managing director of London-based Diffusion, a social media communications agency; and Thomas Gensemer, managing partner of Blue State Digital, which created Obama's social networking site "MyBO."

Here is a rundown of some ad-venturous ways to reach voters -- not to mention burn cash:

• Be the game. Instead of buying ads in video games, launch a custom game on MiniClip.com, one of the most popular ways voters kill time while shirking work at the office. To reincarnate Obama's "Fight The Smears" Web site as a video game and then guarantee distribution of 30 million game plays, it could cost $1 million. A more basic game will run about $300,000.

• TV ads go cellular. Exploiting all the latest high-tech cell phones -- as Obama's did with his 3 a.m. VP text message announcement -- appears to be an idea whose time has come. Sending a video message is a way to reach voters with the same ads that were originally slated for TV. You're essentially eliminating the hassle of determining what markets or channels to buy ads for, since cell phones are with people all the time, UVA's Freedman said.

• iPhone is watching you. Obama has already released an iPhone application that delivers campaign news and tells users which of their contacts live in swing states. But why not use the GPS function on the iPhone to greater effect, suggested Diffusion's Bhurji. A campaign could micro-target users with local political news and direct them to their nearest polling sites on Election Day. And since Google's new mobile platform Android is open-source, Bhurji said supporters could design the software at low cost to the campaign -- perhaps less than $100,000 from start to finish for a national campaign.

• Airwaves are so old school. If Obama wanted to create a playlist for his favorite songs, the marketing people at Rhapsody.com said they'd "promote the heck out of that." If a playlist isn’t enough, the Illinois senator could try his hand as a Web disc jockey and sponsor an entire radio station that would always start playing the hits with an Obama campaign ad. Costs for these options range from $10,000 to $200,000 depending on the amount and length of promotion.

• Make your elevator pitch. Usually members of LinkedIn.com, a social networking site for business professionals, get "InMail" from fellow users about business opportunities. E-mail marketing consultant Jennings had one client send a message via LinkedIn. She said it would cost upwards of $300 per thousand e-mails (sometimes more than $1,000), but numerous companies let advertisers send an e-mail to their list. It's called "list rental."

• That voice in your ear. Services like Podango and Podtrac allow advertisers to reach people on their iPods by placing ads across multiple podcasts at once. According to Podango's Gibbons, both the Republican and Democratic National Committees considered "pod-vertising" through his service earlier in the cycle. Costs vary from about $10,000 to $80,000 a month with Podango, depending on the selection of shows candidates choose to advertise on and the desirability of their target audience.

• Political product placement. Commercial advertising has tapped into product placement in TV shows and movies for years now, and ad expert Freedman said political advertising often follows whatever avenues its commercial counterpart takes. "That's where the innovation has always come from," he said. He was hesitant, however, to say that's where politics is headed. Still, if Sarah Palin's recent appearance on "Saturday Night Live," which attracted 14 million viewers, is any indication, there is certainly a substantial amount of publicity to be gained from getting candidates in front of voters in a non-ad atmosphere.

Political ad experts said it would be hard to gauge the actual influence that innovative forms of advertising like Obama's video game outreach would have on voters come Election Day. They mainly serve as a mechanism that the Democrat can use to separate himself from the political pack, Freedman said. Like all advertising, though, there is the risk of overexposure.

"He's reaching saturation limits that we didn't even know existed," Freedman said. "Keep in mind though, being annoyed at ubiquitous advertising doesn't automatically make [voters] change their vote... As long as the net gain is still votes, it almost doesn't matter. As long as you don't get to the point that you're turning a voter into a nonvoter."