Twitter Hashtags and Virtual Gatherings
I occasionally write for LDS Tech, a blog/forum site for the LDS Church's IT department, where I work. My latest article is titled "Twitter and LDS General Conference." Here's an excerpt:
When participants add hashtags to their tweets, such as #ldsconf, Twitter enables a community of people to gather virtually during an event. Through the hashtag, you can connect to a community of all other twitterers adding the same hashtags in their tweets, regardless of whether you're following them or whether they're following you.