What I would really like to see, although of course you may not want to disclose this, is what sort of projects this person would work on in the first couple of months.
For everybody else, I spent 2 years working on SEM and I think AdGrok is a great product, fwiw. See eg Clickable or KeyMetric as competitors; Clickable is self serve SEM on GYM, at least when I interviewed there. This is a much better interface and helps solve the biggest problem for small business sem, which isn't technical but is convincing people of value and helping nontechnical people use SEM without burning through too much money on account managers.
Too bad I hate writing web apps, because this looks like an awesome opportunity.
Are you planning on setting up call fowarding ala clickable / yodle / reachlocal? Overlaying that information would be awesome, though it's a huge pita...