The N-Gage memory card fits 128mb of MP3s into your Nokia N-Gage for hours of musical fun. Depending on the quality level of your MP3s, this can equal several CDs!
I'm a huge fan of MP3s and have turned pretty much every CD I own (several hundred) into MP3s on my hard drive. I then get to play them whenever I want to, and put them onto my various MP3 players for when I travel.
The Nokia N-Gage has ended up being the perfect portable MP3 player. With the 128mb card, which is TINY, I can listen to whatever MP3s I want to. When I'm tired of listening to music, I can pop in one of my N-Gage games and play that instead. And the N-Gage has a built in radio for when I want something new, or when I want a weather report to see what sorts of rain or snow is in the next city we're visiting!
I highly recommend getting a few memory cards to use in your Nokia N-Gage, to keep a variety of music available. You can of course carry a laptop and cable with you too, which is what we do when we travel, to easily move music on and off the N-Gage. But when you're driving your motorcycle or car down the road, it's a lot easier to use the N-Gage to listen to that music than to run the laptop while in motion!