Where all the traffic at?!?

Has anyone else seen a dramatic decrease in traffic to their website starting on, or about, 02/24/09?

I have seen a drop on my site uSearchIt.com from approaching 700 unique visitors to roughly 100.

Any ideas?

Got about 15 client sites that I have analytics for some doing thousands of uniques a day - haven't seen anything drop off yet.

What are your main target industries?