Rip Curl has announced their H-Bomb wetsuit that has two "powered" heating packs built into it! It uses two polymer lithium ion batteries (I have an old Dell laptop battery now that mine's been replaced in the recall... could I use THAT too? :) )to power two heating packs that sit sort of over your kidneys to keep your core warm. Two settings, Keep Me Warm and IT TASTES LIKE BURNING. Nothing on the Rip Curl website yet, just their E-Bomb and F-Bomb suits so no word on price. More importantly, no word on whether it's suitable for use in a SCUBA application, or if they're just 'wet-resistant' for surfing and kayaking and things like that. I also don't know what thickness of neoprene it is. If it's only a 4/3mm suit, then it really wouldn't be warm enough for temperate diving anyway, heating pads or not.