Link building can be a very powerful tool for boosting your search engine ranking. To put it simply, search engines work by sending their "spiders" through the "web" to find links that lead them to new pages. So the more links you have throughout the web, the easier it is for the spiders to find you, and the more likely your website is to end up in the search results.
Cloud Computing is already a talking point, but many people are debating over whether or not it is secure. For many people, the idea of storing all their data "out there" is disconcerting. With any new technology, it's natural for people to be resistant.