I'm surprised at the lack of comments about Yammer. I used to think it would be a product I'd NEVER use, but for a recent year long project I used it with a tea

I'm surprised at the lack of comments about Yammer. I used to think it would be a product I'd NEVER use, but for a recent year long project I used it with a team of around 20 others. The result was pretty awesome. Emails were rarely sent/received, at least internally, and this was not a policy (the use of Yammer over email just naturally happened). When email WAS appropriate (private discussions usually, or outside partners), it was of course used, but this was only around 10% of the time. Everything else was in Yammer, Campfire, or IM, and it was SO much better. My favorite aspect of this was the ability to include someones username in a post (much like on Facebook, via @username). This would actually ping them to let them know their attention was required, otherwise you can keep up to date with Yammer threads at your own pace. This is not the case with email.