Max and all the others going to OBS Lumut:
You will be searched on arrival at Lumut. You will be required to surrender all your electrical and electronic appliances, which will include your PDAs, handphones, GPS if you have any... You will also be required to surrender your wallets and passports.
Smokers, you will have to surrender your cigarettes. Any food will also be confiscated. So, no chocolates, sweets, instant noodles, canned food... etc.
As mentioned in the briefing package, most items will be provided at Lumut, but you may elect to bring some additional items such as candles, solid fuel, lighters, insect repellent(s), mosquito coils, hydration packs (Camel bags are good), jungle hat (essential if you dun wan your face to be burnt), sun block, hunting / diving knives, disposable water-proof camera, booties... think that's about the stuff you need. Again, most of these items are optional.
Enjoy your time there. Minimal running required, but the expeditions are quite demanding. Leeches will be a HUGE problem. Avoid them if you can, and ALWAYS check when you can. You'll never know where they may end up.
You may want to bring some money over to purchase souvenirs and food en-route to and from the airport. My course ended up at KLIA for a well-deserved beer while waiting for the flight back to Singapore.
Enjoy yourselves at Lumut!