I can't make up my mind about Tumblr.
To make a simple analogy: If blogs are journals, tumblelogs are scrapbooks.
You can also look at tumblelogs as slightly more structured blogs that make it easier, faster, and more fun to post and share stuff you find or create.
It's totally different. That's why we built it, and why we love it so much.
Blogs are great, but they can be a lot of work. And they're really built to handle longer-form text posts. Tumblelogs, on the other hand, let you easily and quickly post and share anything you find or create.
I'm playing around with a Tumblr scrapbook here. I like the idea of a scrapbook — something more impromptu than a blog, where stuff that just catches my attention (often my eye) can go. Unlike del.icio.us, this is stuff I'm not seeking to tag — but when the day comes, as it surely will, that I need to search for something in my tumblelog then its tag-less-ness will be a weakness. (So this morning I stuck the photo of Will Self's room from today's Guardian in my Tumblr scrapbook, but also del.icio.us'd the Guardian piece.)
I’ve got a lot of personal enjoyment and utility out of posting links to del.icio.us, and it seems like a lot of other people get value from reading them - either directly, or on aggregate. I’ve been trying out Tumblr recently and I’m thrilled that it’s allowing me to do the same thing but with images and videos, and the occasional quote. It’s a very free and easy way to keep track of things I think are noteworthy.
A great part of Tumblr's appeal is its brilliant ease of use. Tumblr comes from 'a smallish web-development company in New York City called Davidville' and they have a Tumblr-related blog here. (They also make Senduit.)
Now, if Google Notebook (which is continuing to develop very well) could acquire more Tumblr-like features … Or if del.icio.us could …