Ever try to get a bunch of people together for a meeting, event, wine tasting, etc where you have multiple date choices, and some key people who you want to attend? It's a real pain trying to do this through email.
There is a need for a website where you can go, put in a bunch of email addresses, choose the key people, and a few dates, and have the software pick the date with the best match for the chosen criteria.
Or maybe you just want to see how may people accept for various dates.
How many times have people replied to a mailing list to say yes for a meeting, wasting your time reading the replies? One to many for me.