Microsoft's has rolled out following new features to SkyDrive.
OpenDocument support - In addition to supporting Microsoft Office document types, SkyDrive now supports OpenDocument as well.
Share to Twitter - You can now share to Twitter, in addition to email and Facebook sharing.
Bigger uploads - SkyDrive now supports 300 MB file uploads from a web browser.
Short URL support - You can use the new sdrv.ms URL shortener to help keep within the Twitter character limit when you share via that service.
The SkyDrive team also announced in a recent document outlining the aforementioned changes in the service, that there are "some really big things coming soon."