Not free for a year . . . but CLOSE
Acutally you have Applecare "free" for 90 days. You do, however, have 1 year to add Applecare to your Mac. You also have 1 year of warranty for "free" -- you do not have 1 year "free" phone support just by purchasing your computer as you would if you purchased Applecare.
I'd recommend waiting until you need it (within the one year window, of course). Then purchase it.
Also, if you bought Monitor(s), Airport Base Stations and.or cards, keyboards, mice, Apple RAM, etc. they can be covered by the same Applecare purchase.
Hope this helps.