Good luck.
I was laid off on Christmas Eve. I've had jobs offered and rescinded because they couldn't come up with the money in the budget...despite offering the job. Before my layoff, I was offered a *great* position that was supposed to have started March 1st, but I was advised in late Feb that the project was pushed back six months (job is still mine when it starts).
I started looking in earnest in late Feb./early March since my offers fell through. I interviewed with 17 companies. I had 6 second round interviews. One third round.
....and I received two offers on Wednesday.
Hang in there. Persistence *will* pay off. If you don't hear back from them in a week, call and ask when they expect to fill the position. Also don't be surprised if it takes 2-3 weeks for them to do anything. That seems to be the norm right now.