Well, not strictly speaking, as some Apps are being discounted for more than just the day, and others have even gone up in price, but if you check out sites like AppShopper's Price Tracker, you can see that some bargains are to be had!
Some deals are sure sweeter than what Apple Retail is offering off the iPhone (nothing!) and iPod Touch (a tiny bit!).
I might just pick up BeeJive for $9. If you find any sweet App deals, or any great deals on iPhone/iPod Touch outside Apple, please let us know in the comments!