This is really great. you guys are making something like http://www.kongregate.com and http://armorgames.com right? Best of luck! try contacting some of the creators of popular games on those websites. It won't be too hard to port the games and they won't mind some extra bucks.
No platform is going to take off without good games. So good luck convincing some existing browser game devs.
Thanks for the encouragement, that is exactly we are going to do! It will take sometime, but we hope to become one of the most used platforms out there! We will be launching in a couple of hours, so stay tuned!