The blog admin is quite impressive and the default themes are pretty decent.

Only downside so far: it’s a pity you can’t customise the premalinks – using

• /cagegory/sub category/article title would be better than the default
• /year/month/day/title

[edit] Apparently, this can be achieved on the self hosted wordpress.org (rather than the free hosted wordpress.com) using the following syntax:

/%category%/%postname%/