Having a few problems with Cydia since pwning my iPhone.
Every time I install something my phone hangs, just get the spinning quicktime logo for about 10 minutes and then have to hard-reset the phone. Then when I turn it back on, which takes about 2 minutes for the phone to boot, the application is installed and all's good.
I also have this experience in 2.0 3G firmware, but only occasionally. Now after upgrading to 2.0.1 firmware, it happens everytime I install anything. The "circle" icon at the right side of the wifi icon just animate few seconds, then the whole device hangs. :<