If you want to learn how to do more with WordPress, YOU MUST, not should, MUST head over to the WordPressTutorials.com web site. It's a really awesome course on using WordPress for blogging.
About WordPress
From Wikipedia
b2
b2 was the precursor to WordPress. Also written in PHP for use with MySQL, b2 was originally developed by Michel Valdrighi, who is now a contributing developer to WordPress.
Though WordPress is the official successor, another project, b2evolution, is also in active development.
Beginnings of WordPress
The name WordPress was suggested by Christine Selleck, a friend of lead developer Matt Mullenweg. WordPress is the official successor of b2\cafelog and has a thriving user and developer community.
WordPress currently supports one weblog or site per installation, but there is a multi-user version available. Even with normal WordPress, a user can still have more than one WordPress blog in the same server, even on the same database, by placing the files in different subdirectories.
WordPress releases are named after well known jazz musicians (e.g. Mingus).