Thanks for sharing the additional information. After a week and half I finally isolated the problem and the server has been running smooth for the last 5 days.

The problem was a very poorly made table in mySQL in some OSCommerce addition on one of my other sites... That is the problem about adding 3rd party scripts to your site, sometimes the developer doesn't thoroughly test everything and a memory leak can reside.

After dropping the table, everything has been MORE than great. As always, I promise to always minimize downtime and errors... so if you do ever see odd problems, I'm usually on it quick. However, making a note of it and sharing with me would be very helpful, as sometimes I can't cover every corner. Thanks!