Gah, crap. I had a program around here that used a global ID system, which you could share. I'll edit if I can find it.
I'll also upload my globalID banlist if I can find it...
Something like HLSS, or HLS -something. Can't remember just yet, my memory is crap

*Edit1*
Found the wonid database file, just need to remember the program name

*/edit1*
*edit2*
motherf***er.
just found it. I knew it was HLS-something.
http://www.hlsw.org/Download that, set your server up in the program, and there's an admin section, where you can put in things like the rcon password (as long as you know it, seeing as you've got access to banned.cfg, then you probably have). You can see all the text on the server, all the chats, and all the kills and everything. You might need a plugin to be able to chat with the players on the server, but it's basically an external rcon program. Works like a charm.
Basically, the program is a game browser, but has an area for admin stuff. Send me a PM with your email address on it, and I'll see if I can email you a copy of the database

*Edit3*
And just as a final note
HLSW Wiki.
Might come in handy