I have made an early release of wp-SwimTeam v1.25 available for download. This new version addresses a number of issues when running wp-SwimTeam under WordPress Multi-Site.
Update 5/10/2012 @ 23:16: I have updated the 1.25 beta release, fixing a number of issues where PHP warning were issues due to passing the wrong format of the date to strtotime(). I have also fixed a few other minor issues with the various Options forms so they work consistently across all forms.
Please give it a shot and let me know if you run into any issues.