Hmm - it would appear that around the 19th of January, either the Google Blog search started ignoring the robots.txt file, NOINDEX or NOFOLLOW tags or LiveJournal messed them up somehow.
I've always selected not to have my blog crawled if possible, and until recently it never showed up in Google.
Now I have to figure out how much I care... I mean it's one thing to subject you guys to me raving about my crock pot... *g*
If you need to lock down your journal quickly, I recommend
I searched once and found references to my entries on several toy sites (because I mentioned a particular trademarked game), clothing sites (uh, because I talk about clothing?), politics (ditto, oh and because I trackback)...
I locked it all down. It isn't that robots are necessarily crawling your site looking for things to archive; anyone can easily write an rss feed for any LJ site (see http://jakarta.apache.org/commons/sandbox/feedparser/apidocs/org/apache/commons/feedparser/locate/blogservice/LiveJournal.html) for more information.