I play 6-max so these responses only apply to 6-max:

1. I think the reason that limp-calling from EP with low pp isn't believable is because our range for doing this is basically only low pp's. This assumes that our opponents are actually thinking a little bit about the hand and not half playing poker half watching sportscenter and eating doritos. So I guess that means that limp calling is worse at higher stakes where our opponents will be able to immidiately put us on a low pp, while at the micros many of our opponents won't be able to come to this conclusion.

We should also think about what hands our opponents are most likely to stack off when we hit a set (at micro stakes). I think the hands most likely to do this are high pp's (AA, KK, maybe QQ) and TPTK type hands (AK). Most of our opponents would raise these hands preflop when facing limpers, so why not just make the raise ourselves and not give the thinking players a chance to put us on a small pp? I think playing them in this way keeps our ranges balanced and, like others have said, gives us more of a chance to get value post flop when we hit.

Right now I open raise all pp from all positions.

2. Our set odds definately depend on our opponents. Against an aggressive opponent and/or tight opponent who is more likely to put lots of money in the pot, I think our odds can be around 15x.

Against a somewhat passive opponent I think we need closer to 20x.

10x times seems too low, even at the micro stakes. In the other thread some posters didn't think we'd be able to stack an opponent almost every time we hit a set, and you would have to do this getting only 10x.

3. From what I understand, SC's don't flop a hand we are willing to felt as often as pp's do. Thus, I think its safe to assume we need to have at least 25-30x the raise remaining in the effective stacks. If there is a raise, and several callers, then we can have less implied odds becuase the immidiate pot odds make up for it.

Another question about SC's: does anyone ever limp SC's in late position when there are 2-3 limps in front of us?