For a platform billing itself as the business user's best friend, BlackBerry's list of unsupported protocols that have achieved ubiquity is actually astonishing: you can't do two-way read status sync with an IMAP email account, for example, and amazingly, you can't natively connect to an Exchange ActiveSync service without being routed through RIM's back-end software.

ENGADGET: RIM's BIS 3.0 email features apparently leaked, finally does Gmail justice