iPhoto only received one update, but I think it will be a very popular one, the ability to delete a photo from the Photo Stream. iDevices running iOS 5.1 also have this ability.
iBooks Author received updates in two areas. The first is support for iPad 3's (ok, Apple calls the new iPad, "the new iPad") new Retina display. The other area is performance and stability updates.
All in all, it's been a nice week for the Apple fan club.
Both apps are available from the Mac App Store. iPhoto '11 9.2.2 is a free update to customers who previously purchased the software. If you need to buy iPhoto '11, it can be purchased for $14.99. iBooks Author is free.