I realize this is VERY Off Topic but... I have a project that would be SO MUCH easier if utilizing a cloud based address book. The project is collecting classmates email & snail mail data for an upcoming high school reunion and using a cloud based one would allow for more than one person (me) to collect and enter data. I've been researching these and as is normally the case, there are a plethora of choices... some free & some not; and I would prefer a free option.
Does anyone have any experience with, or recommendations of a cloud based address book? Appreciate any insights you might be able to give.