Here is what Tmo had to say:
We understand that you want to know about the upgrade of Blackberry
Software. We know how important it is to know about the up gradation.
Please be assured we are here to help you.
Melissa, Research In motion has already upgraded the software from 2.0
to 2.1, please delete your Gmail email account and reintegrate it to
take the changes effect.
BIE 2.1 will give you the following added functionality:
8MB messages now allowed again.
Bug fix: tmo.blackberry.net account name can start with numbers
For example, 555123456789@ tmo.blackberry.net
Multiple mailbox icons will be available for 8700 devices (handheld
code 4.1).
The new BIE service provides specific mailbox icons for each BIE email
account, allowing the user to view only the messages associated with a
particular email service/account, such as yahoo.com or aol.com.
Customers will still continue to receive all emails aggregated together in
your "main" inbox.
If preferred, customers may hide these additional mailboxes.
User interface changes to WAP login for better usability.
BIE homepage changes for better usability.
Shared Mail Connector feature now allows multiple users to use one mail
connector application to access their email.
Example: only one user in a small office can install and configure Mail
Connector and then all the other users can enter in the ID of that one
copy into their own account configurations.
Configuration settings have in-context help links.
The Care Console main page will indicate if an account is being
successfully polled or not