Good responses here -- I've only done fairly standard things (ripping all the CDs to a hard drive, converting tapes via a basic audio hookup into the computer) but they've all worked wonders in terms of opening up the apartment.

It's a bit indirect (and apologies for the self-promotion in advance!) but I'm going to be talking about 'the listener as electronic librarian' at a conference next month:

http://www.empsfm.org/education/index.asp?categor...

What is on my mind is not simply the switch to digital but how carefully we do (or don't) organize and present the information we have, how we share it and, possibly, correct it when we find mistakes, among other things...