It's just a matter of time until someone starts MeetUpChurch.com (Domain Available).
I imagine the church would use Twitter extensively to communicate. A church without a building or even a regular rental. A church where the worship service might happen at a park, a habitat for humanity construction site,at a homeless shelter or in a night club or at a movie theatre. You find out the week before.
I imagine the church would either do portable Kids classes or rent a preschool on Sundays that is otherwise closed and earning $0.
I imagine the church might pipe in teaching from whatever amazing teacher is willing to get an honorarium for being "virtually there". Surely they stream teaching. Perhaps the MeetUps are taking place in 8 or 9 places at once.
I figure the leadership of this church is basically a bunch of worship creatives who love a high density urban area. Maybe they decide to avoid the big-preacher-teacher-man-ceo model on purpose.
They are supported by missional Christians who'd rather not be in endless church building campaigns. Everyone would know that the web is used for things like tithing so that logistical things like handling money don't complicate the Meet-ups.
The church-in-a-box people think this is going to really catch on and they'll sell lots of trailers filled with the stuff you need to perform. Ironically, these guys don't actually try to make the place they are in like an auditorium. People stand a lot, bring their own chairs if they want, use what is there. Sometimes worship is a cappella. Sometimes it happens at home as people stream the team and sing along with their kids in preparation for going to the meet-up to do something not-churchy like clean-up a neighborhood.
Ironically, the website of this church is less important than you might think. It's probably just a couple of pages explaining things and helping to make the average churchy person who visited aware that they probably wouldn't like it. On the home page is the stream of twitter updates from everyone in the church. Fowl language probably shows up now and then. So what?
What would matter is that people follow @MeetUpChurch on Twitter.
MeetUp Church probably wouldn't have marketing slogan or tag line, but if they did it would be something like "Meet Up, Do Good"
I'd be MORE likely to go to this church. I'd be doubly likely to want to participate in starting this church with the right team of people with the right leader at the center. You see, even MeetUp church needs a solid leader who can communicate and inspire. I'm banking he can do that without ever-more-creative 3-week teaching series.