One of the companies that had people talking at Mashup Camp earlier this month was Proto, an application for building "desktop mashups". As they describe "Using our visual building environment, you can combine web services like Yahoo! Maps and Salesforce.com with desktop apps, like iTunes and Outlook. Build complete 'composite apps' in under an hour, and drop into the VBA IDE when you need to write a little code." Certainly this is a good enterprise mashup story with its ability to pull together data from the desktop, behind the firewall and the types of APIs listed here.
This week the company announced a new mashup contest where they're giving away 25 iPod Nanos, one each day for the best Proto-built mashup application.
This is now listed on our contests page.