I currently have a very nice case for my Treo 650 (a Krusell Handit Multidapt), however, I am finding that it is not giving me adequate ventilation while multitasking (running MP3's, Internet Radio, streaming audio, etc.), and my Treo heats up a bit more than I'm comfortable with. I'm looking for a case that allows usage of my Treo 650 while in the case, but allows for better ventilation, especially on the back of the device. Any ideas?

Thanks,
Kim