Ok Deborah, for better or worse. A hashtag looks like this: #tcot It stands for top conservatives on twitter. You can do a search in twitter for tweets with a particular hashtag. Perhaps the most successful I know of was #dontgo. It was used by Republicans on the floor of the house staying behind to debate drilling when Harry Pelosi turned off the house lights and cameras. As word got out more and more people followed the exploits on twitter by following the #dontgo hashtag. I believe these tags are effective for a particular event in getting other people on twitter to follow the tag. My suggestion though is if we are instead building a community it may be more effective to simply follow each other's postings regardless of the exact topic.