Last week (July 2008) I had the distinct pleasure of meeting some of the folks from LEKI. They we all extremely well versed on NW and the company has a wide variety of poles to fit any ones needs.
I was most impressed with Alexandra Jurasin's (MS, CSCS) presentation titled "Nordic Walking:Research Review". If you ever get a chance to get a copy of her presentation or hear her speak, do so.
For further information go to their site.