Scoilnet, an NCTE initiative are providing Irish schools with Blog hosting. I tested it out at the excellent CESI conference this year and I must admit, Scoilnet have got it right.
edublogs
EduBlogs is offering free blogs at your own domain
Now there’s no excuse not to run your own school blog! Edublogs.org is a web site that offers all educational institutions, teachers and pupils to run their very own web blog. Before today, if you used this service, you could choose an address: SOMETHING.edublogs.org. However, now you can pick a nice domain name for $25, for example www.scoilsomething.com and they set everything else up for you.