Please remember as people are looking for places to go to be kind. The reason Linux took so long to "take off" is because us linux folks (myself included) were proud of the high bar to entry. Encourage people to be curious, help them learn the ropes, don't bog them down with technical details or the battles that have been taking place on X technology over Y technology. Offer an open easy place for them to come talk.

Once they get the foot in the door for a few months we can show them how awesome Linux is!