[cliffrowley]

One of the things we've tried to do (and this should cover chaosmachine's comment too I hope) is make a tool that is instantly available. There's really no wait time involved - if I'm already on the phone with someone, I'm probably not going to ask them to sign up to a full blown virtual meeting tool like Adobe Connect in the midst of a conversation for example - but I can copy & paste a Woobius Eye session to them however I like; email, IM, whatever means I already have.