Please try the reset procedure, too, to see if you notice an improvement.

We are working on a fix to the problem. It appears to be related to the way the iPhone handles memory usage, and the more apps you have installed, the more likely it is that you'll have problems. The iPhone is more susceptible to this issue than the iPod touch. I have all nine screens filled with apps on my iPod touch (some of them 50-70 megs) and have not seen the crash yet, although I'm still working on reproducing it.