Apple Thoughts: Safari Extension Gallery is Open

"Apple has launched their official Safari Extensions Gallery, at this time it features 100 extensions out of the roughly 300 out in the wild. All of the extensions on Apple's gallery have been digitally signed and sandboxed so you don't have to worry about security problems like some of the Firefox extensions have had in the past. You will need to have Safari 5 to be able to use the extension feature."

I've been playing around with Safari Extensions since Apple added the feature in Safari 5. There have been some bugs, but all in all, it has been a good experience. With the new Safari update that is now being pushed, extensions are officially turned on by default (Previously you had to activate the Developer's menu to turn the feature on.). There are about 100 extension in the Safari Extensions Gallery now, and there should be plenty more to come.