This is great, first hack I've met that actually allows me to read gmail attachments (word/pdf/excel/powerpoint) over 3G, thanks!
As Polvo noted, the linkfixer doesn't work in the standard/desktop version of Gmail, but it works in the mobile and the html versions. Unfortunately the mobile version does not have the "view as html" links and the html version is a bit more cumbersome on Kindle.
I agree with Povlo, it would be great to have the linkfixer as default, I see no reason why I wouldn't like to open a link when I click it.
Also, it would be great to have this as a simple update in a bin with httpd autostarting.
(btw the downloader didn't work at all form me, but I don't really need it)