Building Tools

Blog City
http://www.blog-city.com/

Blogger
http://www.blogger.com/

Blosxom (based on Perl)
http://www.blosxom.com/

Greymatter
http://www.noahgrey.com/greysoft/

LiveJournal
http://www.livejournal.com

moTime
http://www.motime.com/

Pitas
http://www.pitas.com/

Slash
http://www.slashcode.com/

tBlog
http://www.tblog.com/

I haven't tried all or even visited all the builder site, choosing will be up to you. There are fee based commercial options that can be explored.
Take a look at the following book in the reference collection: REFTK5105.888.C59 2004 Weblogs and Libraries, it is not just for librarians. :)