I really like the interface of Tumblr. I do resize uploaded photos myself before I post them there, though, I like a consistent image size.
I set up a Posterous blog for a committee I'm working on. It was easy to set up and password protect, and I can attach .pdfs to an email and send it in to be posted within a scribd viewer.
If I was just going to be writing and linking and such, I'd go with Tumblr.