I didn't think I really needed flash until I bought an ipad2 and realized just how much web content you actually lose without flash (it is a TON)
I just found a fairly cool way to play ALL flash or anything else if you have a working PC or MAC on your local LAN.
All you need is the $4 app Splashtop. That allows to to remotely connect to another computer in your local network and use all the apps/features/games etc. From that computer on your iPad.
I can connect to my PC, open IE and play flash videos exactly the same on the iPad as on the PC and it works super.