Yesterday afternoon Apple released a minor update to their iPhoto software for Mac OS X.
iPhoto 9.4.3 gains the ability to now delete photos directly from the My Photo Stream, export photos directly from My Photo Stream, and allows you to edit RAW photos that have been manually imported from My Photo Stream.
In addition to the My Photo Stream enhancements, Apple also fixed a number of bugs related to Facebook photo syncing, stability improvements and fixes related to making your own books, calendars and cards.
The iPhoto update is free to customers who purchased it from the Mac OS X App Store. If you don't have a current version of iPhoto, it can be purchased for $14.99.