To me, any discussion of PED's in Basketball should not be starting with Lebron James. While he is a prime suspect, to me the two most obvious suspects are Dwight Howard, and our very own Kendrick Perkins. They both completely transformed their bodies, in a relatively short period of time into pretty much super-human physiques. I would also throw Rajon Rondo, who has gained a ton of muscle since entering the NBA, into the mix.
And to be honest, I couldn't care less. Right now, I assume just about everyone is on something. There are so few natural looking bodies out there anymore. Even Scalabrine looks like he's been drinking some sort of meat tenderizer.
Until they come up with tests, to actually catch everyone who is juicing, I don't see the point in singling out anyone.