I carry my Glock 36 in a K&D Dakota Defender. One of my favorite holsters, its an IWB tuckable with kydex clips (i've but C-clips on mine.) I am extremely pleased with this holster and would highly reccomend them. The Dakota isn't advertised any more, but Kevin, who cruises these boards, has stated they can still make them. The new Thunderbird works as an IWB or OWB holster, though, so it may be a better option anyway.
For OWB carry, I use a simple JIT Slide from Don Hume. For ~$25, you can't go wrong with a minimal holster that carries close and has solid form-fit retention.