I have been doing some experimenting recently using an eggdrop bot (which has Tcl embedded in it) and have found that using eggdrop, writing some custom Tcl code, and incorporating Michael Cleverly's nstcl code I can log my IRC channels to a PostgreSQL database using standard ns_db calls. I don't have tons of traffic, but I believe that it would be able to keep up with most amounts of traffic that we'd be talking about and once the data is stored in the PostgreSQL database it should be a cake walk for anyone here to write some basic interface code to allow reviewing the logs. I'd be willing to help out with this if anyone is interested.