Gmail App on the Blackberry or Gmail for PC? Yesterday Gmail made some authentication changes and the @gmail.com is no longer needed for the username but that only relates to using Gmail on the PC, at least with Thunderbird at any rate.
Well, it works with Gmail IMAP just fine. Use the IMAP configuration and it works. You need to refresh folders first as the refresh status doesn't do much other than give me unknown error. I did notice that you have to have a good signal strength to send email or else you get unknown error.
I can't try POP since I use the account on my PC and don't want to upset the balance.