One address for everything you need;
Guy has everything. In fact; not just QTP, think about the whole solution, there are a nice selection of blogs/websites, tips, tricks, examples, etc... It is practically the best source for me right now. Whatever I am looking for it is either in the help menu of the HP tools or there in that blog. It is that simple, know this site, and the help of the tool itself. You even don't need google =] .