I don't know if this is appropriate for this forum, so please move as necessary!
We managed our banned members/IPs via a spreadsheet, but it got rather unwieldy, so I wrote a hack to run it through the ModCP via MySQL. The problem was getting the data from Excel into MySQL as phpmyadmin didn't like any of the uploads I tried to add.
Tonight, I found this handy little tool that will convert Excel into SQL/MySQL insert format and thought I would share for anyone who is looking for the same functionality as it worked like a champ for me.
I don't know a thing about these guys, so I am not going to vouch for their service, but it did convert 2300 rows in Excel into a SQL insert script in about 45 seconds.
http://www.tools2test.com/index2.htm
Cheers!