I've been thinking about trying Wordpress again.
I ran WP version 1.2 for several weeks last year right after Emi started using Movable Type. It didn't seem that impressive at the time.
This year when I started blogging again I just picked Serendipity because I followed a link from Slashdot. I felt at home right away using Serendipity so I guess it's just the inevitable geek urge to play with different tools that do basically the same job.