SwiffOut now has a sister website
http://swiffoutgames.com where you can play flash games fullscreen for free (swiffout is unlimited on this website, it will not display dialogs or expire ). SwiffOut Games is also integrated with SwiffOut to make things a little bit easier.
I also changed the limitation, you can now try SwiffOut ten times on websites other that SwiffoutGames. I think that, it makes more sense, since you may use SwiffOut Free for a long time before trying it to use it on other websites. It also means that the expiration time has been resetted, so if you tried a version before you can download the new one and use your ten plays when you want to.
I filtered a lot games and found some great ones, if there is some games that you really like, tell me and I'll try to add them.