I'm very happy with my Old Faithful IWB for my Nano. I used it the past 2 weeks every day, and it was quite comfortable. I didn't think the Nano needed to spread the weight across 2 belt clips but it made it very secure and comfortable. Plus it's tuckable so I was able to wear it in the office without any notice.
The quick assembly kit cost me a but less than $50 delivered. I recommend them to anyone looking for a hybrid IWB holster.