Um, not quite sure what to say but don't want to leave you unreplied to...
The oldtimers who know each other better may have more to say to each other than to the stranger they've just met, which is fair enough. We all kill threads from time to time (just life, I think).
I think by persisting nobly, writing thoughtful, witty, relevant posts (I do try) and joining in conversations with confidence, you can get in with the in-crowd, as it were.
Dive in - don't hang out on the fringes feeling 'new'! Conversely, don't expect too much in the way of gushing thanks or hugs - MN is quite down to earth compared to some other boards.
And remember it's not immediately obvious to other users that you're a newbie - there's no post count by our usernames and no profile to view - so if you want special gentle treatement you have to ask!
(and remember by the time you've typed a long post, 15 other people will have replied and made all your points before you - DOH!)