Engadget released the first version of Frash. Frash has been developed by @Comex and brings Adobe Flash 10.1 to the iPad. You can only install Frash manually and you need a jailbroken iPad.
The article on Engadget explains how you can install Frash. You also need a file called Frash.deb, but has been deleted from their blog. It can be found fairly easy by using Google search.
Not everything works smoothly. Playing Flash-based games is possible but sometimes buggy. Video-playback is not possible yet, but a future update to a more stable version of Frash should correct this. The video below proofs that Frash works:
Source: Engadget