I've noticed a number of price adjustments. I don't think the application authors had a chance to see what others are pricing before they had to pick their prices.
I expect that the most expensive consumer apps will be $9.99 and that most will end up being priced at $4.99. Apps by the big web service providers, like AOL, eBay, PayPal, Skype, etc. will almost always be free.
I won't be buying any apps over $5 until the pricing settles down and there is enough web buzz for an app to justify a higher price.