I get a fair amount of traffic from search sites because I mentioned being able to do a sort of LJ cut on blogger. At that post, though, I didn't say how I did it. I don't like to disappoint, so if you're surfing here to find out how to do a split or cut post, they're called Selective Expandable Posts. The instructions are here at Hackosphere, posted by Ramani. I just followed the instructions.
I hate to spend a whole post not mentioning my own obsessions, so here's a nice picture of Page and Plant singing to each other.
Edit: A commenter writes that Blogger now has its own, much easier, cut. (04/17/2012) Thanks!
Hello! I also found your post by googling "lj-cut on blogger" and it was one of the top hits, so I thought I would mention that Blogger now has this thing called a "jump break". It looks much easier to use and more similar to an lj-cut!
It doesn't say on that page right now, but if you're in HTML mode, you just type !--more-- as a tag (between less than / greater than symbols).
Man! Shows how often I use Blogger!