Well, the bindings finally arrived. It will take me a few days to actually install them though. The weather isn't very good now, anyway, so there is no hurry (the weather was great yesterday, but that is a different story). I hope you aren't waiting for my response, but in case you are, I'll give an early assessment. It is hard to describe everything involved in this project, but I took a few pictures to help.
The skis: The skis are used Salomon Snowblades (probably 2008 or so). They are about 99cm, with a sidecut of 100, 80, 90. The term "snowblades" has become synonymous with ski boards, even though it is a Salomon name (like Kleenex or Band-Aid). Amongst many skiboarders though, they are considered inferior. There are several reasons for this, but the one that matters to me is that they are a bit too skinny (for their length). This place says as much. The picture is accurate, but a bit misleading, as they sell skiboards the same length (and shorter) but none that skinny. They have a link to a forum that describes the situation (scroll down to "Kirk" who summarizes things well).
I don't feel bad about buying the ones I bought though, as much of my skiing will be on solid, consolidated (Spring) snow. Besides, I shopped around, and the cheapest "good" skiboards I could find were $200 or so (as opposed to the $50 I paid). Plus, much of my time will be spent carrying these, so at that point, the smaller the better.
The Ski Board Bindings: The snow blades came with their own (skiboard) bindings. These bindings are meant to work with regular (Alpine) ski boots. As mentioned in the links in the previous paragraph, the bindings are considered inferior, so I imagine they are being phased out. If I was more of a tinkerer, I might try and attach something to these bindings. They have lots of possible attachment points (I wish we lived in the same town, Dave, as we could tinker together). Here are some picture links and descriptions of the bindings:
Skiboard with binding and one without: http://www.flickr.com/photos/rossbl/4686018549/
In relation to my foot (size 10.5): http://www.flickr.com/photos/rossbl/4686651520
Closeup of binding: http://www.flickr.com/photos/rossbl/4686019257
Binding detached: http://www.flickr.com/photos/rossbl/4686652234
Upside down binding, with bars and one bottom plastic piece removed: http://www.flickr.com/photos/rossbl/4686019889
Side view of binding: http://www.flickr.com/photos/rossbl/4686020249
Another view (showing how you can remove bottom plastic part): http://www.flickr.com/photos/rossbl/4686020585
Hopefully all of that made sense. I could certainly rig something up so that my boot stayed attached (at worse, I could do a Gulliver's Travels type thing, using the gaps). The hard part is making it work Nordic style. Which leads me to:
Berwin Bindings: I haven't installed these, so I'm not sure how well they will work. The attachment points don't match any of the holes in the skiboard (they do match "Nordic Norm" though, so they match a lot of existing Nordic skis). Here are more pictures, that I hope will show how they work:
Top View, laying on top of ski: http://www.flickr.com/photos/rossbl/4686020947
Side View, with boot inside: http://www.flickr.com/photos/rossbl/4686654024
Bottom View: http://www.flickr.com/photos/rossbl/4686654370
Another Side View: http://www.flickr.com/photos/rossbl/4686021941
The boot is basically pushed as far forward as it will go. It pushes into side bumpers and the strap. The binding is attached at three points (see bottom view). The first point is one of those single holes. The second and third are parallel each other (the screws go through the strap). So, hopefully you can imagine how the thing will flex.
The Boots: I use a heavier boot for Spring hiking that I do for summer hiking. This keeps my feet drier and makes it easier to kick steps in the slush. These are all leather, REI brand boots, but I believe they are just an OEM from Raichle. The leather is pretty soft, but the sole is fairly stiff (for me, anyway). They weigh 1' 13". I think they will work fine, but any stiffer boots might cause significant fatigue. Lighter boots would be fine, but might make it harder to control the skiboards. I'll let everyone know when I get a chance to try these out. Hopefully the snow will stick around until then.