Assorted smartphone things

Now I've got a phone full of mp3s (hah, who need's an iPod) but I'm currently getting a bit irritated having to manually copy over mp3s every few days (it can hold about 8 hours of music, which is fine for a couple of days, but if left any longer than that you begin to notice the same tracks repeating) so I'm hoping to have a go at making my own automatic music sync prog (that'll just swap a few old songs with new songs every day,) but sadly getting code to work that'll make the PC and phone talk is becomming a bit of a headache. *sigh* - why is nothing easy.
Yes, that's why people need iPods, cos the software actually works!