Did they increase RAM in iPad 2? Since there was no hint about more RAM during the presentation yesterday, did anyone find out if they stay with 256 or (like iPhone 4) increased it at least up to 512?
Apple never releases information about memory. The current rumour is 512 MB. You should wait until some opens it up (e.g. iFixit).

And there you go . iPad-2-Wi-Fi-Teardown. 512 MB of Samsung manufactured RAM.