With Flash 10, Flash Lite 4 that is Flash 10.1 compliant and full 10.1 rolling out right now with Android, sites appear to be updating and blocking anything less than Flash 10. Some video and game sites that did work on the N900, do not now and instruct that the latest version of Flash is needed. Mega lame.
Added:
They work fine with Flash Lite 4 on Incredible, but no keyboard makes most games unplayable. Mega lame part deux.
At least I saved a ton of games already, but blocking sites that worked with Flash 9 video sites is just wrong. Especially the jiggly sites... That is just wrong. Sadness. Well, at least the jiggly sites work on one of my devices, but fellow jiggly site lovers with N900's are jiggle free now.