I also am having issues with my SkyDrive...although want I am seeing is no syncing from my iMac.
Adding documents etc from other pc's works fine, and on my ipad, but nothing syncs from my iMac to the cloud folder.
I seem to find very little about this on the net, although there are several complaints on the MS site about it.
Finally got mine working....just required a re-install of the software from the MS Live site, and now it works.
Seemed a real shame to blow the free 25Gb storage, back to the miserable 2Gb from Dropbox. Also the fact that you can edit online is a real bonus....