If you're looking for a great gift for the cat lovers on your list -- or a fun read for yourself, let me recommend my book, _Cats in Cyberspace_ by Beth Hilgartner, published by Meisha Merlin Publishers. The novel is a humorous fantasy, told in "first-feline" voice by Fluffy (one of my five cats...), and I have found that it appeals enormously to cat owners and computer users, alike (even those who normally would not read science fiction). You can look at reviews, cover art and a sample chapter at my publisher's website:
http://www.meishamerlin.com/CatsinCyberspace.html