I have just returned from a 2 weeks holiday in Bali where I managed a weeks diving at Tulamben and a couple of days on Lembongan Island searching for Mola mola. Diving at Tulamben was sensational, reminded me a lot of Lembeh except that there was massive wreck to explore in the US Liberty. The Liberty is an outstanding dive site however if I can offer anya dvice it's to dive first thing in the morning or around 4 in the afternoon otherwise you will see about a million day trippers from Kuta diving the wreck. Great macro and critter diving in the Tulamben region whilst the wreck provided some good wide angle opportunities.
Diving at Lembongan was much different, crazy insane currents and more dive boats on 1 site (Crystal Bay) than I have seen anywhere else in the world! Managed to see some Mola’s however had to say photography was challenging in a raging current or when there were 15 divers around a single Mola.
If anyone is interested in the adventures of Scuba Snoopy, he wrote an article on his Mola mola experience here:
http://www.daveharasti.com/Bali/Snoopy/index.html
All images were taken with a D300 in an Ikelite housing using DS125 strobes. Lens used were Nikon 105mm and 60mm, Tokina 10-17mm and Sigma 17-70mm. Some of my favourites include:
Barra with Diver

Harlequin Shrimp (Ever since I first saw this critter I've always wanted a shot with a black background and finally had them in the right spot at Seraya)

Tomato cod at cleaning station

Coral cod on Liberty wreck

Pygmy Seahorse (Hippocampus bargibanti)

Mola mola at Blue Corner (very difiicult to photograph when you're flying past in a current!)

Giant Anglerfish on Lembongan Island

More images can be seen here:
http://www.daveharasti.com/Bali/index.html
cheers,
Dave