Blogger

Pros

• Supports team blogging.
• Blogger is the only service that support Universal XML-RPC Weblog Interface that allows third party clients like w.bloggar to add/edit/delete posts.
• Can publish to your own site via FTP.
• Categories supported via Labels.  Each  label has own feed 

Cons

• Categories are NOT supported.
• Posting images is a bit tedious.
• Does not support podcasting. Feedburner can be used to add enclosure tags to your podcasts.
• Feed in ATOM format only
• No support for  separate pages 

WordPress

Pros

• Categories
• Supports Pages

Cons

• No  FTP

MSN Spaces

Pros

• Offers various
  degrees of privacy ranging from only allowing you, or selected people,
  to see your blog, all the way up to "public" — meaning anyone can see
  the blog.
• Offers Lists of URLs

Cons

• Does not support podcasting
• Can not publish to your own site