I’ve been increasingly fascinated with the notion of greasemonkey (sadly firefox only right now :/ and bookmarklets- of (like wiki) making the web more interactive and less one-way. Coolest example of the day is the tip bookmarklet (by way of Cefn Hoile), which lets you email a digital tip to any email address in a page. Pretty cool hack, and a nice example of thinking about making things more interactive/two-way without really messing with the basic infrastructure of the web.