Thanks for the link to precomplied executables. I gave up on installing as per github instructions since on my OpenSUSE 12.2, running npm returns a strange error ("node: symbol lookup error: node: undefined symbol: _ZN2v811HandleScopeC1Ev") and I can't seem to find a way to install grunt.
For me it just keeps on Buffering viewo..downloading..and then keeps on doing that. I had the same problem with the official version too. The longest I've checked is ~60 minutes and it was right there where it started.
However, for the same file of 1.5GB it took me ~10 mins to download. (Mac)