there is a video about phil helmuth and how he plays AK somewhere in this forum...

basically...

raise, reraise

i will tell you how i play AK in both ring and tournament play.

ring. i play it very aggressively because i either want to pick of the blinds or only have one other player in the pot (two max). then after the flop if any callers i play it the same as any other hand but i can put my opponents on a somewhat of a stong hand also unless i notice that they are bad players. then in that case i hope to out flop them. haha

in tournaments i play it completely different. early in a tournament i will usually just limp with it and sometimes call a small raise depending on position. and then later in the tournament i would play it somewhat over agressive being that it is one of the best starting hands. this aggressiveness doesn't apply to me if i have a dominating chip stack i usually play it normally then.