I just signed up on these forums. I have only had my iPad (32 gb ipad2) a couple of weeks, and have become quite addicted to it.
I did the upgrade to ios5 yesterday evening. It basically went pretty smoothly - there were a couple of errors along the way but it worked in the end.
I now have a couple of apps that no longer work; a couple of older gameloft games have problems, and the akai synthstation does not work at all. Everything else seems fine.
Regards to all,
Ps I really wish the iPad virtual keyboard had arrow keys and forward delete. I remember that in 1984 Apple insisted that they were unnecessary on the original Mac, and they don't seem to have learned since.