Dermot has a mini-rant about this on his blog. It turns out that in order to do most anything useful on journalspace you need to pay for it. For example exporting RSS2.0 feeds is a premium service, which makes allowing rss readers access to your site (last updated pings, for example) costs you money. Being able to post from external applications (via XML-RPC) is another premium service, making cross blog synchronization difficult.
I suppose that is the price of using a free service.
If it wasn't for carbon-14, I wouldn't date at all