edit: They do look good though!
Can we stop creating stuff in JS/CSS that we would have ridiculed other people for doing in flash? I can't possibly think of any situation where this would be useful for a landing page.
That doesn't mean we stop trying to make web pages look prettier.
Using jQuery for this type of problem seems a little out of place to me. That said, this is certainly "neat." THAT said, I don't believe this has real world practical value. Its too computationally expensive considering what it adds.
Edit: the fix is to add https://raw.github.com/ to the pref noscript.inclusionTypeChecking.exceptions in about:config
And, sorry, but I'm not going to add that to about config.
2005 - transparent drop shadows.
2012 - realtime drop shadows!