GmNotify is a tray applet that notifies you of new messages from Gmail and provides an easy mechanism to get to them.
GmNotify will run in Gnome, KDE, and XFCE. I know, there are already a number of programs out there that provide this functionality. However, they all have limitations I've tried to address here.
Smart notification placement
The notification popups will automatically be placed with the tray icon, much the same way Update Notifier does. Note: This only works on horizontal panels for now.
Multiple account support
GmNotify will have the ability to check multiple Gmail accounts a once.
No Gmail feed
Originally GmNotify used Gmail's ATOM feed to get updates. This limits GmNotify to reporting on only 20 messages at once (not that you should actually display more than 5) and, more importantly, doesn't give you automatic label support (see below). GmNotify actually logins into Gmail the same way your browser would.
Labels will be fully supported before v1.0 so you can check more than just your Inbox. Also, all of your labels will be automatically imported, so there's no need to explicitly define them.
Those of you behind a web proxy will be covered.
Automatic login to Gmail
When you double click the tray icon you'll go right to your Inbox. Simple, but convenient feature.
This is another simple but nice to have feature. When you click on the senders name in the notification box you will be brought to your composer window in Gmail.