When I carry mine I'll be wearing a vest with an integrated holster. I was thinking something like this could be a nice choice.
http://www.google.ca/imgres?imgurl=h...26tbs%3Disch:1
I have heard that with a Glock a hard type holster can be an issue. If you are reholstering and you get web strap or shock cord in there also this will be more likely to cause a ND.