Wow, I've got to say this is pretty cool and very easy. I got my copy of CS3 Web Premium today and am posting this directly to my blog from Contribute CS3.
This is my first post using Contribute CS3 - blogging was a feature added with Contribute 4. A number of popular hosted blogging sites are included, my site is on TypePad which is on the list so lucky me - one thing that I've always been aware of is that I'm not the best spellerer in the world and this now addresses that problem.
In the past I've usually created my posts in a text editor, done a spell check and then copied the post into the TypePad interface - this is a whole lot easier as Contribute CS3 connects to TypePad directly, gives me a WYSIWYG view of the post in place rather than the HTML form that you've usually got to fill in.
Spell check is there as is a lot of other tools, nice job Adobe - well done!!