I've just updated the Amazon Associates bookmarklet to v1.1, which bookmarklet generates an Amazon product page tagged with a specific Amazon Associate ID.
For the past few months, the publicly available version of the bookmarklet has been unusable. The problem was that it was a little too hard-coded and required that Amazon maintain the URI structure that existed when I originally created it. When Amazon changed their URI scheme, the bookmarklet broke. In any event, this latest version is a bit more robust and should work without issue for the foreseeable future.
The bookmarklet can be found on the project page. Enjoy.