OK I succeeded in my first pulse measurement using the webcam. I first collected the pulse by placing the webcam under my thumb, then I calculated the mean of each frame using python and PIL (frame extraction through MPlayer). Afterwards I implemented an high pass filter of 0.5Hz and Wala! Most of the work was done in python. The video was captured through Photo Booth and plotting was done using excel. I plan on consolidating all this into processing. My design specifications are ready too.