Same issues here. It has been about as frequent both before CL14, and since CL14 (which I applied about 10 days ago).
Up until late last week, once I lost data/network (the tell-tale send icon only, and everything else dead), I would soon get a message the process com.samsung.internal encountered an error and needed to close. Power-cycling and/or reseating the battery were all I could do to get back to normal.
Hoping against hope for an easy fix, I called Sprint. Predictably, this is not in their list of known issues, but they did some things to re-provision data on my phone. 45 minutes later, I was back to square one. No more errors about com.samsung.internal crashing, but still the (too frequent) loss of data.
I have un-installed Google Voice (never used it anyway), and I run limited widgets. Still, the problem persists. It's at least a once-a-day need to reboot.
Love the phone, but this issue is really disappointing. If 2.1 doesn't solve the problem, I'm going to have to push Sprint to exchange the phone for another model.
In another thread (on another board, I think), I saw someone suggest that, if you can get your hands on your MSL code, you can set the phone to EVDO only. He claims that it solved his problem. I have not tried this for myself, so I can't vouch for his claims (nor do I know whether this causes any other ill effects)...but if someone is feeling adventurous and wants to try it out, I'd be curious to see if it's worth chasing down the MSL.