I have just recently found out that iPod nano speaks.
Well, it doesn't do any on-the-fly voice synthesis but if you check the “Enable spoken menus for accessibility" on your iTunes, it does generate the voices for each and every meny on your iPod plus each and every artist and songs, so you don't need to take out you iPod to check which song is playing.
The detail is explained here: Apple Accessibility
I have an iPhone myself, but I bought the new iPod nano just for this feature and am very happy with it ;-)
