I bought the D|Focus along with the marking disc & reference pin already in January 2010 and have used it on every single one of my shoots since I got it. Mine is V2 but there is a newer V3 already out. So I'm sure it's only gotten better with the update.
I was contacted by Hannu Kälkäjä of Hangrip a few months ago and he asked me to review some of their products on my web site.
FedEx dropped off the Glidetrack SD a few days ago. Took less than a week from the moment I made the order online to arrive to Finland from UK, fast service! I bought it specially for a music video I'm shooting end of April where I wanted to have very slow moving shots.
Since I graduated from school in 2005 I haven't really been able to afford to shoot on film anymore. I made a big investment in 2008 and got a Sony EX1 and a Letus Extreme and a bunch of good Canon FD lenses. A year later I sold the EX1 and the Letus and got the Panasonic GH1. Here's a little write-up on my impressions after half a year of use.