Hey, I really like Mike's suggestions for higher givers.
The most important thing for your situation isn't to raise a ton of money, really. It's to use the marketing leverage that you get from having a Kickstarter project to help generate a user base.
Maybe you can have access to the beta group, or call it the alpha tester group? as part of the rewards at a very low level.
Also, you might like this spreadsheet I just posted that helps manage a Kickstarter budget. I built it mostly for arts projects - films, records, etc. - so my advice about what to do with the $25 reward probably doesn't apply. It should be pretty useful for doing the math though, cause the formulas are all baked in for per unit costs, etc. - the really fun part is where you list your probable backers by name, because you're just starting out.
If you find it useful, let me know! If it's crap... let me know that, too. I want to make it better.