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.)