Rather than send out a batch of owls and have flock return at the same time, the muggles invented IRC. IRC (Internet Relay Chat) is a virtual meeting place where people from all over the world can meet and talk; you'll find the whole diversity of human interests, ideas, and issues here, and you'll be able to participate in group discussions on one of the many thousands of IRC channels, or just talk in private to family or friends, wherever they are in the world.
IRC to some is a black art (hmmm... must be a Slytherin invention ), but seriously, it may not work the first time out. Keep at it. There are plenty of people who want to help you. To use IRC, you can log on via a website, or you need a small program (IRC client) like mIRC (http://www.mirc.com) for the PC, or snak (http://www.snak.com) for the Mac.