The 75 comes from having 5 "groups" each one with up to 15 contacts (5x3 grid). Once widgets don't receive "swipe" events I couldn't implement the synaptic scrolling. So there you have: 5x15=75!

By the way, this is the first time someone suggests that 75 is too little. The idea was to have your "A" list at your finger tips. In the future I plan to have the mycontacts application (not the widget) support filtering by group and include a "nice" search so you can get to your "other" contacts quickly too.