Just got my 8900 yesterday.... Couldn't set up internet e-mail from the device for like 2 hours kept getting site not found error...
Finally was able to set up my gmail account and all was well.. Until I logged into the BIS site to set up my signature.. And add an additional account.. Ten minutes later my Gmail disappeared. Additional e-mail had disappeared. Kept getting the same error from the device account cannot be validated..
Decided to set up a blackberry e-mail account which worked fine for forwarding but obviously not what I want. Every time I put in the gmail adress the next button on the BIS would not load, but cancel worked fine.
Trying to log into Tmobile today and now the site doesn't even load... Using Safari I log in to Tmobile and it returns to a page continue without logging in.. WTF.. Try it with Firefox get to Setup Blackberry e-mail page click the link Blank Page... Try it on a windows machine same deal... I have tried from 3 computers so I don't think its just me..