Any time I can transition a service that is important to me to one in which I am the customer, I grab that opportunity quickly. I'd happily pay gmail $10/month for mail in which I was the customer, and not the advertisers. $4/month for a user supported twitter environment sounds like a bargain - particularly as all the people I suspect I want to "follow" (or whatever the join.app.net terminology will be) - have alrea…
It's only $5/user/month and they offer a free trial. No ads, of course, and a SLA.