What It Is: The iTunes Wi-Fi Music Store, which lets you buy songs and download them right to your iPhone or iPod Touch — no computer necessary — as long as you’re in a wireless hotspot.

Who It’s For: Compulsive shoppers and instant-gratification music-hounds.

Why It’s Worthy: Provided you’re in a hotspot, you’ll find the service to be extremely quick, easy and smooth (we downloaded about forty songs in just under six minutes). It’s the full iTunes music store, too, though most of the music is only accessible via the search mechanism. Also, your songs download automatically to your desktop iTunes the next time you sync up your iPhone or iPod Touch.

Our Only Complaint: If you don’t know what you’re looking for, or just want to browse, you might be disappointed with the dozen or so “top ten” music selections in each music genre category. Somehow, though, that didn’t stop us from buying most of our songs of these very same “top ten” lists, which are not unlike the New Releases bins at your average brick-and-mortar music store.

Cost: Free to download to your iPhone or iPod Touch, but songs cost the same as on standard iTunes ($.99 for most songs, $1.29 for iTunes Plus songs).