It looks like RIM is opening up the App World Test Center for other developers. RIM announced the test center a bit back as a testing ground for new applications. Joseph let me know that they have now added the Sensobi Contacts Free Beta to that list.
This free Beta is a bit limited since it is limited to your top 10 contacts unless you get the pro version. The interesting part is that Sensobi is selling a pro and non-beta free version also in the app store. I am waiting to see if RIM is going to start allowing all developers to put beta builds into the Test Center… Though I hope they relax their approval process and submission prices for the test center. Otherwise it would defeat the purpose of a beta test if you cannot update it quickly.