Marketing a new product or service for Twitter is easy because you really only have to use one word: Groups. I’m not even sure your product needs to do it well for you to have thousands of signups within hours.
But “grouping” in Twitter is in serious want and so people will sign up to do it.
You sign in using your Twitter ID, which lets you join and create both public and private groups centered around different topics.
Groups are built around RSS feeds. But you can set up topic-specific groups which pull from a number of feeds, including Google News, Eventful, Digg, Yahoo Finance, Twitter itself, blogs, and so on.
You can set it up so that the feeds are filtered by keyword (such as “Android,” Kindle,” “Knicks,” etc.). Members of the group can then discuss any headline by commenting in-line. Each comment can be pushed out to Twitter proper as well.
Both RSS headlines and comments can be “Buzzed” up by popular vote. The result is a combination of RSS content and Twitter conversation, all in the same stream.
Sounds pretty interesting to me. I’ve created a ChurchCrunch Buzzable Group here. I’d love to see a ministry or church really take it out for a spin.
If they are still available, try using techcrunch as a signup invite key.