Grabbing SkyFiles from the Nokia Store. It's written in Qt and is styled well, though there's no customisability in terms of screen fonts or presentation.
One unfortunate oddity in the current version is that your login details aren't remembered - you have to type in live ID and password every time you launch the app - surely this will be fixed in short order? There's a one-time warning screen about access to your SkyDrive account.
A two-tab interface is easy enough to navigate, with toolbar buttons becoming enabled once the relevant source/destination folders have been set; and downloading a test Word document to my Symbian phone.
If you're interested in SkyDrive access, I'd recommend grabbing this and keeping an eye out for updates via Nokia Store - with some development effort, this could be a definitive cross-platform tool.