Registration Software (OT)

[Marty Knapp]

This is a bit off topic, but I was wondering if anyone is using a 
web-based, out-of-the-box software package for tracking registered 
users. I don't need anything too elaborate, but it would be nice if the 
user could update their info and you could do a simple mailing to notify 
people of upgrades (if they opt to receive such).

I've poked around but haven't found anything that looks very appealing 
and I'd rather not roll my own at this point.

Thanks for any input,
Marty Knapp