According to a leaked internal calendar, Sprint is poised to launch the Motorola Xoom and the Nexus S 4G in early May. If you take a look at the above image, Sprint is slated to begin training for both the Xoom and Nexus S 4G on April 25. Based on Sprint’s past, product launches usually follow the initial training date by two weeks, thus the expectation that these two Android devices will launch sometime in the second week of May. Rumors have been circulating for quite some time now that Sprint will launch its own flavor of the Android Honeycomb running tablet — the Xoom. And, we all know that the Nexus S 4G should be launching any time now, since it’s already been announced and pre-orders through Best Buy have been underway. With both these facts in mind, the current rumor seems pretty legitimate, but of course, we’ll have to wait for official confirmation by Sprint to know if it pans out or not.