Gnome, a software developer and macosxhints reader, created a technique to enable autofill in any browser using a simple online form. He originally posted a beta in this macosxhints' forums thread. This is such a valuable enhancement that I thought (with the developer's approval) it worth a hint. Here's the description of Pseudo Autofill:
This form will produce a bookmarklet (a special kind of bookmark) that adds an AutoFill button to any browser at all, like Safari 0.6.2, Camino and Netscape. Simply fill out the form below and drag the resulting link to your bookmarks bar, or for Safari follow the instructions below the link. The next time you come to a page with a form, click the bookmark and the form will be filled out for you. No personal data is sent to the eFritz staff--check the code if you don't believe us. JavaScript is required for this to work. Pseudo-AutoFill supports textfields, multiline textfields and pulldown boxes.It works better than the original IE Autofill in my experience, in that it will work in any browser ... gasp, even those on Windows!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030406104324521