I know there are multiple threads for the random reboot situations. I also get these reboots, however I have noticed that during these reboots I have been at work. My storm would reboot 4 times or more a day. So I got to thinking, what do I do different at work from regular phone usage when im off. Then it hit me, Bluetooth! I use my Bluetooth while at work. So now I have turned my Bluetooth off today while at work. Now let�s see if this is causing the reboots. I don�t know if the others are using a Bluetooth when there reboots happen, but if you are; then it might be something worth trying.
I had bluetooth off and it still rebooted. My solution so far has been to delete Visual Voicemail. I believe the VVM watcher service has a memory leak... since it runs all the time waiting for a voice mail I think it's the culprit. No reboots since I removed VVM.
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I haven't had any reboot issues in the three weeks that I've had mine. I removed VZ Nav, VVM and BBM to improve performance, I didn't realize I may have been solving a problem before I even experienced it! :-)
I'm sure there's something on your phone causing these reboots. I have a Storm from the original release day that rebooted for no reason. I upgraded to .76 from Bell and it still rebooted. I deleted an application and then reinstalled it and now the random reboots have stopped. I use bluetooth in the car, office, and at home.
My log said I had an issue with my calendar when it rebooted last, so I removed Google Sync since I only needed it once, and that was the only thing I had done with my calendar and so far so good....
. my vvm has already been deleted. so im out of ideas now. 
