Good stuff.
Wulf came up with an added edge to this by finding the closest HTML colours to the flickr logo instead of the red and blue. Shameless plagerism has my signature looking like this...
flickr
The code looks like this
HTML Code:
[url=http://www.flickr.com/jamesfletcher][b][color=#0063dc]flick[/color][color=#ff0084]r[/color][/b][/url]