Even more weblogs

In response to my estimate of the number of weblogs,  a reader drew my attention to opendiary.com (nearly 3,800 users) and freeopendiary.com. The reader says the latter has half a million users, but I can’t find any information on the site to substantiate that. Any ideas if this is true? If so, it’s a pretty significant number — putting it the same league as LiveJournal and Blogger.