Of course, I personalized it. After packing it with music, I discovered video podcasts. Educational, entertaining, esoteric -- little bursts of eye candy! I love being able to watch clips of The Hour or science tidbits from NASA or whatever other weirdness there is to offer. I downloaded some games, too -- Bejeweled2 and a cute little Eye-Spy type game called Little Shop of Treasures. (The only drawback is that the videos and games are quick to drain the battery).
However, the best application I found has to be Stanza, an e-book reader. When there's a wireless connection you can download books from a dozen different sites, many of which are free. (Hubby even uploaded one of his books to Smashwords, one of the catalogues supported by Stanza.) I've been reading like crazy -- The Curious Case of Benjamin Button by F. Scott Fitzgerald (good story, pity they had to make a movie), I, Robot by Cory Doctorow (well written but somewhat cliched), the Smashwords publishing and marketing guides, and The Public Domain by James Boyle (still in the midst of this one). I've got 23 items (books, stories and collections) in my Stanza library right now, including a couple for Kiddo, some classics (Heart of Darkness, Call of Cthulhu, The Picture of Dorian Gray...), fiction and non-fiction. I love that Stanza remembers my page and is so easy to hold and use that I can read with one hand!