nice to see another wmii user. I've been mentioning it a bunch myself lately. I came across it in trying to find a decent window manager that I could control, comfortably, all via the keyboard, and wmii fit the bill best for me. especially if you live in a bunch of xterms (which I do at work), having a tiling mode in your session is sooo much more efficient, and compared to others I tried, wmii was simply the best in terms of balancing features and ease of use (at least to me).
at home though, it's mainly gnome or kde for me. having the wife and kids learn metakey-combos to cycle through windows and open up programs isn't all that practical ;-)