I would like to make a site with similar functionality to [url removed, login to view] All I need is the programming (HTML and PHP) I will be doing the graphic design myself.
The site doesn´t need to have all the functioanlity of Meetup, but most of the basics would be nice: browsing groups by location and interest, creating a group, joining or leaving a group, uploading picture and personal information, creating a personal page, rsvping to an event (with yes, maybe and no). Also one or two persons who are the organizer of the group should be able to post events and notify everybody through an email list.
Please let me know how much time it would take for you to have this finished. It would be good to have a simple version up and running reasonably soon.