Quadrille - 1:00 pm on Dec 5, 2008 (gmt 0)

I don't think there's any one answer.

Know your target audience, know your product, and experiment.

I suspect focussing on your potential visitors and their expectations and desires will usually be the best way, but if you have a target audience who already knows what they want, then a product oriented approach may be quicker for them and easier for you.

Of course, a well designed site with good internal labelling and navigation will often serve both approaches successfully, allowing you to make the best of both sets of keywords.

Search engines focus on pages [urls, actually!] not sites, so catering for both is entirely possible.