I never stopped making mashups, although I slowed way down in releasing them. After Tumblr, I sporadically posted stuff to YouTube and Soundcloud, and put them on Reddit which feels a bit like pissing in the ocean, if the ocean was also piss.
Recently after getting an email asking for a specific MP3 (which seems to happen every 6 months or so), and out of frustration with the existing publishing platforms and their maximalist approach to copyright enforcement, I gathered the motivation to learn some basic web design and make a website for myself. It's at hawkinsmashups.com, and it's got all the mashups that I don't think are really bad after listening to them now.
I've got probably 50 more completed mashups in the tank that I just never got around to releasing, I'm going to try my best to start releasing them regularly. So uh follow me on Soundcloud or YouTube, or if you're feeling nostalgic for the old days of the internet, just bookmark my website and check in every now and then!
Thanks
Alex