My setup:
90cm snowblades with Stubai universal bindings. Very light and portable. Total cost: Snowblades $40 (slightly used) + Stubais bindings $65 (slightly used) + custom cut skins from a raw strip $40 + ski crampons $60 + heel lifters $20 + free crampon straps from the REI basement.
Some things I've learned about them:
They're wonderful for spring conditions where big flotation isn't an issue. Love these things.
With skins, they climb as steeply as any other ski.
Ski crampons only come so wide. If you want them as an option (obviously very useful), don't get too wide a ski. It's a flotation vs ability to crampon thing/wt thing.
With skis this short, stability/flexibility of the binding doesn't matter all that much. These Stubais are about as noodly as it gets, but they still work fine, even in avi debris. Standard ski mountaineering bindings would be huge overkill and, as has been mentioned, pointlessly heavy.
Snowblades are so thin that you must 'clamp' the bindings on the ski by countersinking through the ski base and using pancake nuts (available at ski shops), followed by a petex job. Even if the petex comes out of the countersink, you won't really feel the difference...these aren't exactly high performance skis anyway. You can try epoxied threaded inserts and to leave the bases intact if you wish...that system lasted exactly one run for me before the binding screw pulled out and I switched to the aforementioned system.
I'm making my own custom universal bindings from some Rivas for a higher flotation, winter pair (the Stubais aren't exactly easy to get). We'll see how that works out.