I compare my sales from last year Friday June 12th with this years Friday June 11th. Last Years traffic level for the day: 1415 unique visitor, sales for the day 13.
Now on June 11th 2010, traffic level: 1471 uniques, sales 6.
Last year I could tell time by the sales, nearly one per hour.
This year, (and just after May 17th I might add), sales are down at least 50% - all I can presume by this data is that the traffic is now much less targeted. Like I said above, we'll have a streak where traffic seems to return to normal, then a complete shutdown. I doubt the economy has much to do with this.