[tobylane]

When you say alientube for all websites I think this replaces comment threads from websites (eg Disqus on blogs) with Reddit comments from where that site was submitted to Reddit. That would be something I install.

This looks nice but like the others I've seen doing the same thing I'm not interested until it's big.

[MelSchlemming]

Yes, that's literally what it does.. (in addition to allowing users to comment on webpages)

Well it doesn't actually replace the other comments I guess, it just lets you view the Reddit ones as well. There's a demo on the home page, you don't even need to install it to try it.