flickr, since Blogger says it's an easy way to post photos to my blog.
I love their registration screen where it says, "Your screen name is like a nickname. You can have spaces in it if you like. For example, Johnnie Rotten or My Little Pony are both fine."
I bet those screen names are already taken though.
So here's a cool picture taken by George.
Next up, I'm going to try their Mac OS X upload feature and see how it works.
The upload feature works pretty well, but you can only add one photo at a time. If you select a group of photos and drag them to the flicker upload application, it crashes. Also, instead of dragging the photos directly from iPhoto to flicker, I made them smaller first.
Here's my flickr photo album.
Note: They are going to have Pro Accounts soon which will allow, "Permanent archiving of everything you upload". I guess that means that the photos you upload on the free account won't be there forever.