[CentOS] I've been hacked -- what should I do next?

Fri Dec 1 18:14:28 UTC 2006
Alfred von Campe <alfred at 110.net>

Thanks for all your suggestions.  I'll be trying them out over the  
weekend.  At first glance, it doesn't appear that they gained root  

Is there any sense in reporting this?  I have the IP addresses from  
which they logged in.