I was in an Apple Store here in CO yesterday and noticed that retail boxes of Parallels Desktop have arrived on the shelves. In fact, I had a nice discussion with a customer who was switching because he could now run Windows on a new Mac (he never considered Virtual PC an option - I personally don't blame him). He even used the term 'safety net' to refer to how often he hoped to have to run Windows - if ever.
I also just received an email from Parallels promoting a $20 rebate with the purchase of Parallels Desktop ($80) and Windows XP (either $200 for Home or $300 for Pro). The rebate is good through August 15th, and Windows XP must be purchased within 14 days of Parallels Desktop.