So much for my ability to fantasize that I have higher karma than Eliezer because I can only see the first four digits. (Which wouldn't have lasted much longer anyways, since he will pass 100x my karma before long.)
I have a simpler Greasemonkey script that does approximately the same thing. Advantages: (1) shorter and simpler, (2) displays karma on a green background, which may feel more familiar, (3) may possibly cost less time when an LW page loads. Disadvantages: (4) has a fixed width region, which may become problematic when Eliezer's karma passes about 10 million or look strange for users with karma below 100.
(Mine works by adding a new CSS rule that applies to the relevant bits of any LW page. Vladimir's works by selecting the relevant bits and tweaking their styles directly. I wrote mine mostly because I wanted to remind myself how Greasemonkey works; also because of points 1-3 above.)
I wrote a greasemonkey script that fixes the problem with Karma bubble that prevents you from seeing the last digits of Karma for big Karma values. You can install it from userscripts site. You'll need a greasemonkey extension (install for Firefox, install for Google Chrome).