Dabbleboard is one of the more useful and functional web 2.0 sites that I have seen.

It’s a blank piece of canvas that you can scribble on. A nice place to do a quick mockup of an idea or a concept. Once you’ve done your sketch or dabble you can download it as a PNG file and put it on your blog, or you can share it and make it publicly available.

It’s the sort of thing I can see myself using quite a bit. If I’m trying to get a concept across to someone I can sketch it, share it, and then IM them the URL. They can look at it, even modify it, and then we have a better visual idea of what we’re discussing.

It’s also useful for making a quick graphic for a blog. If you want to mash up a few images and add some notes for a blog post this is a very very useful tool to do that with.