I found very impressive underwater photos posted inside the E-P1 forum: http://e-p1.net/index.php?topic=275.msg1889;topicseen#msg1889
This photos has been taken inside the underwater tunel from the “Underwater World in Sentosa island”, Singapore.
Amazon.com has some E-P1 related products in stock:
1) The Olympus MF-2 OM Lens to Micro Four Thirds Adapter
2) The Olympus 14-42mm f/3.5-5.6 Zuiko Digital Zoom Lens (Silver)
3) And the Olympus FL-14 Flash for Olympus E-P1 Micro Four Thirds Digital Camera