I've had my i-Mate Jasjam for a little over a year now, and for the most part it's been very reliable. As of late, I've been having a little bit of battery problems. In particular, it's because most applications continue to run even after clicking on the little X in the top right hand corner.
Over the last year, I've slowly added more and more applications, and tend to spend more time surfing the web (or just have programs like tinytwitter running).
Anyway, today I stumbled across a little feature that I'm sure was not on the original WM5 rom that was loaded when I got my phone, but was added by I-Mate in the WM6 rom. Basically, it actually closes the application when you hold the X button for a few seconds. This avoids constant trips to the task manager and clicking the "Stop All" button..