The CRA Taulbee Survey (http://www.cra.org/statistics/) has detailed info on CS faculty salaries in the US and Canada. 2005-2006 9-month salaries for a new PhD in CS with a tenure track position ranged from $70k to $99k with $82k median. Of course, you have to get one of those positions first. PhD production has been at record levels in North America for a few years now. It seems lots of people decided to go to grad school after the bubble burst. The survey has incredible detail including, for instance, how many positions opened up as a result of people dying!