If you’ve been enjoying Chatter Email or waiting to use it until attachment support arrived, today is your day. Chatter Email, in case you’ve been sleeping through things lately, is a IMAP (IDLE required) email client that can PUSH email to you in the background. It’s a very efficient email client and can manage up to 8 connected mailboxes, either folders on an account or 8 different accounts.
The latest version is 1.0b10.2 and fixes an early attachment release issue, but is stable enough to use daily if you like.