TTF font for LEGO bricks
I searched around on dafont.com, fonts.com, and myfonts.com but didn't find anything.  However, I found this post on the eurobricks.com forum from 2008, which links to this page:

http://www.house42.com/2008/09/17/legorama-fontstruct-font/

This font (and its variants) are all available for download as TTFs (free account registration required):


Legorama
Legorama Fill
Legorama Everywhere
Legorama Everywhere Fill


The fonts are available under the CC BY-NC-ND 3.0 license (Attribution required, non-commercial use, no derivative works).

Alternatively, if you're feeling really ambitious, here's a tutorial on how to make a LEGO font yourself.