Posting out of position

[ike]

This has probably been addressed elsewhere but it came up in a conversation recently so I decided to see what people on here think. How many players do you need to make posting in the CO correct? Obviously it depends on how good you are, how good your opponents are, etc. Assume 1/2 blind structure (does 1/3 or 2/3 change this much?). Assume you beat the game for about 1BB/hr. Also, do you ever post in the CO+1? I sometimes do in games with opponents I particularly like if its 10handed.