Popular blogging service, open to the public (basic features) and to paying clients (expanded features). Popular not just among the general folk but among UGP-folk, such as Nick (link (deprecated)), Andrew (link), Kevin (link), Olivia (link), and Kelly (link).
Update: Nick and Andrew have both migrated their blogs to other locations, (here and here, respectively) while Kevin simply lets his rot.

See also:
blog, rss