Acer has begun to roll out ICS for its Iconia A100. I got a cheap (perhaps display unit) from the US at around US$200 about half a year ago. Absolutely happy with it. Now with ICS, it is even better. If you can't wait for its official rollout, google the relevant terms (at XDA) and download the ROMs there. The version I originally downloaded was v1.012. I subsequently overwrote it with v1.014 and everything is good.
About hardware / software / mobile experience. Hope to save somebody's time one day. This site is ad-free. No nag screen on ad-blocker :-) Please leave a comment if you find the posts useful - or post a comment for update and new info.