My first robot

I just started playing with robotics a few weeks ago when I got my arduino. This is my first attempt at a obstacle avoidance robot. Pretty basic. I am building an arduino shield to clean up the wires and get the motor drivers on a board. I thought it would be fun to learn how to make a pcb. Today I sat down and started learning eagle. Here is my first attempt at making a board... This is a motor shield I came up with. I have 2 l293 drivers to control up to 4 DC motors on a separate 12V supply. I have also placed pin headers for easy wiring of sensors and motors. I ordered a proto from batchpcb, so I'll post more when I get it in and installed in my robot. Please let me know what you think, this is my first attempt and I would love some feedback. I will post some pic's of the robot I am building and the source for this board tomorrow.