HTC Home Plugin Customizer
This program will let you customize, backup and restore the HTC Home Plugin. You can also get the weather forecast, setup favorites (one touch dialing), change backgrounds, and a whole lot more. If you get one app for your HTC, this should be it. It works on Windows Mobile 5 and 6.
The feature list is located at the link provided below. There's too many to list and keep up with. ;-)
This program is written and maintained by emunutz. I only host the files and do some beta testing for him. If you're having trouble, he's the guy to talk with (see below). You can reach him via the PPCGeeks.com Forums.
The official release site: http://www.pocketemu.com