As we've discovered during the last session of the Principles of Invention class at Stanford, server technology is going to be a strong control point in the emerging mobile applications space. Google continues to build a leadership position in technology and mind share among software developers and corporations. They (Google) become embedded into the fabric of the new generation of web applications.
For example, CNET writes:

MySpace's announcement that it has integrated Gears into its messaging system to create a backup of messages (email) to a user's computer and thereby enable faster searching and sorting of the messages. With 170 million messages sent each day on MySpace, this adds up to cost-savings as it needn't process all of the email searching and sorting server-side.

Or look at Google's App Engine, which is one area in which Google keeps trying to "mak[e] clouds of computing power more accessible to all developers." Google is now opening up App Engine to everyone, not an elect few, at pricing that is very compelling.

We'll probably explore further invention/innovation opportunities in this space during our next class, BUS75