I've only been using LiveATC.Net for a few days... I chose "other" in the poll because mostly I've used my networked (by hacking) DirecTivos to listen to audio streams. It's sort of fun to get bored of TV and in a few clicks be listening to ATC! If I am near/on my PC I use Winamp.
I took the "all" list and grabbed just the "Status: UP" entries, made a playlist.m3u file and put it onto my box that is running JavaHMO. I used the JavaHMO interface to add that playlist as "Air Traffic Control audio".
The box running JavaHMO, in turn, makes the LiveATC (and other stuff like movie showtimes, wx maps, etc.) available to each of my 3 networked DirecTivos.
By default, DirecTivos aren't networked, but if you have a Series 2 DirecTivo that is NOT an R10 model you can add networked features so that it can do most of the same networked stuff that a standalone Tivo box can do - see http://www.tivocommunity.com/tivo-vb/showthread.php?t=265929
for info on getting networking going.
I am also able to securely access my DirecTivos via the web to setup recordings, check listings, etc.