I posted this in another thread, so I'll post it here too!
For those of you who are sick of hitting the live! button on the Today screen, here is how to change it.
Its possible to change the right softkey (I did so myself last night). What you need to do is download a registry editor. I used one from
here. When you select download, pick the Pocket Pc 2002,2003 (ARM/PXA) version.
Once you have installed the cab file on the phone (browse to the location you saved it, and click on it) then run it.
Navigate to the key" HKEY_CURRENT_USER\Software\Windows\Today\Keys\113"
You'll see there are two keys, Default and Open. The "Default" key shows the value to be displayed on the right key, and the "Open" key points to the application to be ran when that button is pressed.
I changed my Default to Inbox and my open to "\Windows\tmail.exe" <- The quotes are important here. Although it doesnt ACTUALLY go to the inbox, it does go to the messaging screen.
Hope that helped