With player growth, you can actually get 7'2" small forwards (I've had two in Live 2005), 6'9" point guards (seen two) and probably 7'6" centers (haven't seen any).
I had a Phoenix Suns team in Live '05 that had a 7'2" PF, a 7'2" SF, a 6'7" point guard who was an 88 OVR, a 7'1" SG (converted from SF) on the bench, along with a 7'1" SF as 6th man.With the exception of the SG, those were their natural positions. They were good, too.
I'm trying to do the same thing with my Utah Jazz team in 06. I tanked a season and got a 7'1" SF who was projected 2nd Overall, but he had Very Limited Potential and is quickly busting.

If you spot any players like this in Live 06, especially ones who grew an inch and got even bigger. Please tell. They might pop up on mine also.