did this happen to anyone else? my appbrain app list got removed... completely, it now only shows what I have installed on this new rom
That's 'cause appbrain sees it as a different phone. I installed appbrain on my, now froyo phone, and appbrain.com has my old profile "SCHI500", and a new profile, "Samsung Fascinate".
Just go to your old profile on appbrain.com and "select all", then right above it, click on "add to list", and pick the new profile.