This is a two part post. The first order of business to attend to is this fantastic MOC by Peteris Sprogis. Brick built lettering can be difficult, especially if you want some panache to it, but Peteris pulls it off beautifully. Although it is important to point out that this is the second iteration of this MOC, because sometimes a "P" can look an awful lot like an "F".
The second order of business is to bring up what this MOC is actually promoting. It's a Flickr group called, you guessed it, Part Challenge. It's sort of like Iron Builder for the rest of us. Check it out and get building!