You are not alone
Ii have tried the same but havent found a way. I can share a folder via the web interface, but sharing a folder like live mesh is able (and dropbox for that matter), I have not yet found.
I'm so happy to see the tight integration of sync and skydrive finally happening, but also waiting for this feature. I can only imagine MS is working on it and it will arrive soon... ... ... Still waiting .. ... ... come on MS - Get to it
Cheers
Jesper