That's a lie. I've gone on dA for browsing purposes, but I too have made the move to tumblr.
I have an artblog up, which will mostly consist of sketches and process drawings for the bigger projects I'm working on:
http://thefroginthewell.tumblr.com/
I'll still post my bigger pieces here, but I find tumblr relieves some of the pressure against unfinished and practice work that I feel here.
How have I been? College is how I've been.