Look what Berry Review came across. It looks like RIM is in the stages of Beta testing a new enhanced Gmail Plugin.
If I remember correctly, it was just up a few days ago or so, then was later taken down. So not sure if it's still up there.
Some of the features are listed below...
- See your Gmail based emails in Conversation View for simple topic management
- Add and remove labels and stars to emails to keep inbox organized
- Archive and report as spam actions for mailbox management on the go
- Search your entire Gmail inbo
In the thread a member posted for the OTA you simply go to this webpage.
Also it seems like BIS 2.7 is required to get this plugin to work.