Blogger.com relaunches with a new design and a lot of new features including:

• Standards compliant output; all pages produced through blogger will now be compliant with W3C standards for web design.
• New comments for your blog
• Many new templates by well-known web designers, including Jeffrey Zeldman.
• Post Pages - each post generates it's own search engine friendly page with the title of the post in the file name.
• More detailed user profiles that you can incorporate into your blog.
• Email blogging - post to your blog with email, the subject of the email becomes the title of the post.
• Conditional tags - show different information depending on the type of page, eg. for individual post pages, you can include a link back to the main page of the blog.

For new users, there is also a brand new Blogger tour

More info:
Search Engine Watch: Google Overhauls Blogger
BBC: Google revamps blogging service
a.wholelottanothing.org: Blog this
Webmasterworld: Blogger redesign, with standards! (Free webmasterworld reg. required)