OK, I love my droid eris, it's a great phone, BUT, it has crashed 4 or 5 times in the 2 months I've owned it. Every time it has happened, a hard reset was required to get my phone to even boot up. After reading numerous posts and talking to Verizon reps, I have the suspicion that apps or app upgrades are the cause.
Since the droid marketplace is an 'open' dumping ground (for lack of a better phrase), there are numerous apps that are probably causing problems, but in most cases, there is no way to figure out if there is a problem until it is too late (unless there is a comment on a particular app).
So it's downloader beware with no policing and no possible recourse for those of us who download a bad app. In other words, anarchy.
In my opinion, Google and android, in their quest to advertise XX thousand apps and suck in unsuspecting users, have either overlooked this or turned a blind eye. Bad news to us droid owners.
So, droid users, be careful. I would check to see if someone you know has had problems with an app before downloading it, unless you want to spend several hours resetting your phone. And Google/Android, the more times I have to reset my phone, the greater chance I will buy an iPhone next time around, even though I dislike that fruity red company.