[paulnrogers]

You can't really provide much value without knowing the goals / intentions behind the campaign / activity and obviously decisions on channels would be massively dependent on verticals, circumstances and budgets, however content campaigns alongside paid activity can be good from a launch branding POV.

I've seen people combine offers with quirky / creative content, which is leveraged via paid StumbledUpon, Twitter and FB advertising to generate brand impressions and traffic.

I've also seen sponsored YouTube content work quite well for startup brands.

Obviously SEO and PPC / displayed are more acquisition channels - but dependent on the goals, these represent good channels for quality / qualified traffic.