I found a couple of pages where you can get help in finding a good swim workout for yourself or for your team. I am sure your swim team sometimes appreciate a change from the standards, so keep them interested in this wonderful sport.
The first site requires sign up, but after that you can get advice and workouts fit to your skin, so check it out http://www.swimplan.com/index.php and let us know what you think.
The second, is just a big old database of all kinds of swim workouts, so go crazy and try something new. - http://www.swimwestside.com/workouts/wsscworkoutssearch.html