A few years ago, I found that I like SPD so much that whenever I need to buy shoes, I try to buy SPD. Now I think have more SPD shoes than non-SPD shoes. I have a pair of SPD sandals, a pair of Pearl Izumi shoes that appear to have started out as running shoes, a pair of "touring" shoes kinda-sorta like the
MT-33's that [MENTION=21724]cyccommute[/MENTION] cited, plus a pair of mountain racing shoes that I don't wear much any more. I still haven't found a pair of dress shoes designed for wearing in an office. There have been rumors that they exist, but I haven't seen them yet. The ones [MENTION=21724]cyccommute[/MENTION] calls almost-wingtip still look athletic to me, but I guess that's a matter of taste. They also don't look great for walking because of the curved sole.
One of these days, I might have a cobbler merge two pairs of shoes to make SPD dress shoes for me. I have a worn out pair of SPD sandals I can use for the sole.