Some of you might know I had a K-7 and DA 21mm stolen a few months ago. Insurance covered the camera, but didn't extend to the lens (my fault). I wanted to get into some lower-light street stuff, so I picked up a Sigma 30mm f/1.4 second hand recently. It's a very workable focal length, but very slightly too long for an ideal street lens for me, so hopefully in the future I'll pair it with the 21mm limited (unless Pentax comes out with a fast 24mm, dream = 24mm f/1.8 WR), which would be a great combo.
Anyway I just thought of this because I was going through some shots I have from just before the camera went walkabout, and edited this one, which I'll post here - and will have a bigger version up on my website too.
21mm was a little gem. Sharp enough, tiny and fast AF.
Sunset, Nelson