JCA - you make a great point. Took a look at their TM filing again, and it's strictly with regards to the phrase on apparel. When one files for a registered TM, the "class" of good/services needs to be declared. In this case, it's solely for "wearing apparel."
I could care less about the tshirts. I just did that because I wanted my own and then people just started buying them before I even made it public.
More I research, the more it looks like this is how it will go down:
1) They'll send a C&D letter, trying to scare me into handing over the website (which I shouldn't have to do since I purchased it prior to their TM registration.)
2) If I don't fold, they'll do some investigation to see if they can prove that I purchased the domain "in bad faith" - i.e. squatting on it to turn and sell it.
3) Since that's not the case, it appears they can try to negotiate with me if they truly want the domain. If not, I just have to make sure I don't do anything to denigrate the "brand."
It's all just semantics, really. Haha. I just want to continue with the blog (it's not a clown blog, bro), and having purchased the domain has really helped with traffic, obviously.