I blog. I read blogs. I upload my blog posts from my PowerBook to a TypePad server via MarsEdit. I retrieve blog feeds from various web servers via NetNewsWire.
By the way: I highly recommend using a dedicated blogging client for writing blog entries. Yes, it is nice to be able to author blog posts in a browser, but my friends and I have experienced the “Back Button of Death” that effectively kills your post. I highly recommend MarsEdit on OS X. On Windows, I’ve heard ecto is good. For Linux users, I highly recommend vi. ;)