With 130 million registered users worldwide -- and more than 240 million total users -- if you haven't heard of Yahoo!, then you've probably been living under a rock.

However, that doesn't mean that everything Yahoo has to offer marketers is obvious. That's why we've put together the second in our series of looks at the top search engines and how their tools and marketing opportunities can make your job better and easier.

As you'll see in the following pages, it's no mistake that we discuss content before search. While Yahoo started off as a search engine to be reckoned with, it's now positioning itself as the leading content contender. The site has gone beyond search to bring innovative content across all channels-- especially user-generated content. This strategy is often referred to as the "flickrization of Yahoo." And a large portion of Yahoo's user-generated content presents numerous opportunities for marketers. With the right content, marketers can be valuable to Yahoo -- beyond the fiscal sense -- by joining in the online conversation. Marketers are generating content and it's a partnership that Yahoo welcomes with open arms.

We'll take a look at Yahoo's capabilities and interactive marketing opportunities in content, search, email, IM & voice, mobile and marketing services.

Of course, you can always just buy a banner ad, but what fun would that be?

Author Notes:
Nanette Marcus is an editor at iMedia Connection.