Good choices man, but TMS is barely picking up in my opinion. For 4.0 stangs with power adders, we have like 13 or 14 of em posting regularily over at the american-speed/collective one.
For posts all the time, MF is always has the most traffic, though you have to sift between personal posts, technical posts and appearance posts...but its a cool place.
I wish stangnet would pick up, I guess I need to be posting more here. LOL.