You are definitely not the only one having this issue.
Just bought a Samsung Intercept. Not even a month old and it happened to me today. The phone would not respond no matter what I did. Plugged it in to the charger and it lit up but the keys and the touch screen would not respond.
Had to pull the battery to get it to start working properly.
Once the bat was pulled it would reboot and seems to be working properly now but since others are having this issue on other phones and they are reporting the OS to be android 2.1. I am wondering if it is not a OS flaw.
Hoping it does not get worse before the 2.2 update this summer.