Family pack?

Just ordered a couple via Staples (never ordered from them before but they seemed to be one of the few stores still with stock!). I've been using the beta for a couple of months on my NC10 netbook and it's been excellent so fairly happy to pay for the full version. One thing I've heard mentioned before though is a 'family pack' (I believe OS X is available like this) - it put me off slightly from purchasing but I £50 for the full version still isn't too bad a deal.