Do folding (or telescoping) cross-country skis exist and if so are they useable?
Update: Or are there small cross-country skis that are short enough for easy transport, yet still capable of providing support for uphill movement?
This question had two answers that unfortunately didn't survive the migration. I'll post what I've found, as well as one of the links from @Refineo's answer (the other link was a patent description). Here's a folding ski used to climb mountains, so not cross-country compatible:
In addition to @Refineo's links, I was also able to find some other websites, but nothing really conclusive, or useful.
Similar to the MTNapproach skis: http://www.climb.co.at/index.php?lang=en
Russian Patent holder of folding x-country skis: http://www.vector-ski.com/collski_e.html
Backcountry style, but no longer available for sale: http://www.zigzagtour.de/index2.htm
Home-made folding skis: http://www.woodly.de/blog/?p=41
Update: Most of the above links are no longer reachable, but possible viewable at the Internet Archive (http://www.archive.org).