Well i know with all the rgb coming out everyone is looking at all the options. Here is another for ya. This one used 12 5050 RGB leds on a 18in pcb. Runs on 12v or 24v. There was a group buy 2 years ago on these and i jumped in on some but i wish i bought more at the time lol. These lil suckers are really bright. most people i show them to are impressed. I plan to add another 60 to my display as there is finally another group buy running on these. Awesome part is they go pretty quick with the skillet and in no time you have them built.
Pic of board
Wiki for building these, still in the works for the complete how to.
Here is what blickensderfer did with his. Pretty cool and awesome idea of mounting.
Video of them in the tint tube from aussiephil - pretty cool
My video of 5 of them on my trailor - it is 75ft long and the last 15ft is the only part not lit up.