http://chris.pirillo.com/what-is-the-future-of-hashtags/ The other day, my friend Bill Boyd blogged something along the lines of, "Will Hashtags Work in Email?" This is a good question, especially considering how these tags can be used to organize content and discussions between larger groups of people.
In addition to several social networks, these tags can also be found in YouTube. Around the time of their fifth anniversary, YouTube added limited support for hashtags including: #LOL, #FTW, #OMG and #FAIL. When you click on one of these tags, you're taken to a page that shows others that have used the same tag in their comments.