Just got my Titanium Silver 545i on Friday, got hit by somethin gon the highway which caused a small chip on the hood. Does anyone know of a good touchup for this?? Any company make good touchup pens??

My experience is the best thing to do is buy touch up paint from the dealer. Using the tip of a toothpick, apply a very small amount of paint, let dry, and apply a very small amount again, until you've filled the chip. Several thin layers are better than one big blob of paint!

Be aware that light silver like yours is the hardest color to touch up. The tough up usually appears darker due to how the metallic flakes mix with the paint--shaking very well tends to minimize this.

If you want to try the touch up pen approach, this company has very good products:
http://www.paintscratch.com/