You can find out more about the 5320 XpressMusic in All About Symbian's in-depth review (which was written before the N-Gage app became available, and should be updated soon to take account of it).
N-Gage now available for the Nokia 5320 XpressMusic
Published by Tzer2 at
The N-Gage application is now available for download for the Nokia 5320 XpressMusic. If you want to download the app directly onto the handset, just go to the 5320's Games folder, click on the N-Gage logo and then click on the 5320 XpressMusic link from the list of downloads. If you prefer downloading the app via your computer, click here to find out how to install using the PC and Mac method.