Ipods are awesome. They are mp3 players that can store amazing amounts of mp3s. The only way i would recomend anyone getting it is if:
1) You have a high speed connection: no use taking advantage of all the space if you can't download more than an mp3 or two a night.
2) You have a bunch of money to spend. Those things aren't cheap, the used 20gb ones, which will hold a bunch of songs, run for 350 on EBAY. lol. the 5gb which are still big, go for around 150 on ebay. New the 30's go for 500, and the 5's go for 250. The 5's could get about 1000 songs onto them, so thats a lot. But many need more than that.
3) You're not interested in recording from mic in or line in, just mp3. That's basically all these are. They can't do anything other than that.
4) You don't need to go long times without recharging. These suckers last about 10 hours playback time. Now they charge in a flash, I.E. The 5gb charges to 80% in an hour. But with only 10 hours of life, don't go taking any long car trips.
5) You don't care about size. They are small for mp3 players but not when compared to md players. The 5gb one weighs 6.5 ounces. Normall md players weigh a little over half of that.
The 5gb ipod is 2.43 by 4.02 by 0.78 inches = 7.6915
Md's are around 3 by 2.8 by .78 = 6.552.
Only a little over an inch, but makes a huge difference.
If you're not interested in any of that. Absolutely go for an Ipod. They're the best mp3 players on the market.