With the physical they will mail you the magazine monthly. If you opted for the digital they would email you the magazine. Also, I *think* the digital copy doesn't have the coupons.
It DOES do the homemade recipe feature as well. To get there:
More -> Edit Food & Exercises -> Recipes.
I've never tried FitDay so I don't know if it is more unwieldy, etc, but the Recipes work well, provided you pay attention to what your ultimate serving size is as well as how many total...
Content is based on your account itself. Your account can be authorized on 5 PCs/Macs at any point in time. The iPods, etc, don't count against the total authorized machines.
That's not how it works. Your PC can be an authorized user for any number of iTunes accounts (like PS3.) If you had a game from a gameshare account, as long as your PC/Mac was authorized you could load items from that account and your personal account on the same iPhone/Touch, etc.
Last year GS had the same deal on other Ubisoft games like Far Cry 2, Prince of Persia, and Tom Clancy's End War. With the temporary price cuts, the used prices were still $54.99. It wasn't until the price cut was permanent that they dropped the used price.