As you may have read somewhere else, Microsoft has decided to put the Consolas font (as included in Vista) online for download.
For those of you who haven't got the chance of peeping into Vista (and copying the font files) but like to write the occasional program/markup in a neatly presented manner, take a look at this beautiful fixed-width font. Best to be displayed on a ClearType-enabled display.
Besides changing the monospaced fonts of your IDE, browser and text editor I recommend changing the font of the console window in order to make things consistent.
Now playing: Talc - Modern sleep over