I just got back today from Bali. We only ended up doing 2 dives (1 day trip) to Crystal Bay. We saw one baby mola mola getting cleaned for a few minutes before the crowd of 20+ divers spooked it away... We had around 8 boats in Crystal bay during our dives. We were diving with BIDP and they said the manta sightings have been rare so we opted out on having the 2nd dive at Manta Point and did a 2nd dive at Crystal Bay, where we proceeded to freeze our arses off as the thermoclines dropped to 16c at one point!! Absolutely amazed that there were a couple people in just shorties!!! nuts...
After just chilling in Jimbaran Bay, we stayed over at Mimpi Tulamben for 3 days. The tornado of jacks were there every morning. Last time I did USS Liberty, it was for my OW checkout dive over 10 yrs ago, so it was nice revisting this site. Despite the crowds of daytrippers from Sanur, there was plenty of fish life. Mimpi staff were great, and very relaxed about solo nite dives... Had a blast doing 80+ min dives out to Drop off point and back to the Mimpi house reef. Even had the jacks come into to the shallow outcrop on top of Drop Off Point. Came across a cute little blue/green bobtail squid in the sand. There's a monster green moray in the rocks right in front of Mimpi as well as some other smaller yellow morays. Will try to post a few pics later.
Met up with Mike V. for a few beers in Sanur, where he proceeded to rub it in about seeing so many mola molas a few weeks ago with no divers around... 
Adam - the flash on a point and shoot isn't very strong, so unless you get in real close to the mola mola, it won't do much other than light up backscatter. This was my 1st Mola encounter so I'm sure the other experts with more experience will have better advice. I was told best not to rush in else you might spook them. Wait until they tilt up for a cleaning and go into a little trance...