I've put together my first hack using pewbot — suggestions based on an individual's loan history.
By running a user's loan history against the "also borrowed" database, it's possible to build a list of titles that should be of interest to that borrower.
For example, if a student had borrowed the following 4 IT books:
…then the top 10 suggestions are:
Interestingly, when I ran the code against my loan history, it recommended me a batch of DVDs that I'd actually like to see 
I'll let some of the library staff beta test the suggestions and, if all goes well, we'll add the code into the "My Account" section of the OPAC.
OPAC Tagging – Who's It?
There's an interesting discussion about tagging and OPACs over on the WEB4LIB mailing list. Start here and work your way through the thread (so far the subject line hasn't changed so it should be relatively easy). Some interesting comments and…