I used to really hate blogs, all of those stupid sites such as Livejournal or Blogger where a bunch of teenage girls (and unfortunately guys) use horrible grammar, l33t sp33k, cAmElCaPs etc to talk about absolutely nothing. But I've come to realize the software can be a really good way to manage content for a site, especially when more than one person is updating it. I started checking out more "content management" oriented systems, and they are really useful. I know movabletype is really good, and there are a few others. You can really customize them, and integrate them into your existing site pretty easy.I don't however like all those carbon copy sites that use PHP Nuke etc. If you really do want to "blog" like an online journal, with no focus then a free site like blogger would probably suit you just fine. Otherwise run your own site.