I've been interviewing as well, and plenty of companies have either gone totally silent or cited hiring freezes after very positive interviews and even some offers. It really burns to put in the hours and have things go cold, but I try to remind myself how much worse it has been and could be. It's alright to have to work a little harder at times like this.
I'm looking for much different roles than you are, so our experiences will differ. My advice for anyone would be to be persistent though. There's not much to lose by keeping at it and maintaining good spirits, but there's a lot to lose by giving up. You could be surprised to find that connections you make now are rewarding when the economy is looking better, too.
The job market isn't a reflection of you, and losing out on opportunities will be easier than ever, but not by any fault of your own. Give it time and do your best, and you'll find something.
Good luck, keep your head up!