freestroke atm im still a noob at moeller methodology. i can get it kinda fast in my right hand and slightly slower in my left but i cant do them at the same time like a roll. what i ment about the blast beats is when i try to do them i try to make my hat hand and snare hand go the same speed. but when i double kick my double kicks end up going twice the speed.
Cool cool, keep practicing the freestroke and whatnot, it'll really help with your blasting
For the moeller technique and other hand techniques, I highly recommend Jojo mayer's recent 'secrets weapons of the modern drummer' dvd, there are some torrent's of it floating around. He basically show's every hand technique imaginable, such as the free stroke, moeller and all it's applications, push/pull etcetera. in extreme detail, complete with slow motion close up's and whatnot, it really helped me out!
For the double pedal blasts, you should learn to keep your pedals both in time with your hands and at twice the speed, use a metronome, start slow and build up to higher tempo's.
There isn't anything wrong with using one pedal for blasts, Derrick roddy does it this way, most metal drummers use two to conserve energy though. Although my feet are fast, there a good 20bpm behind my hands so I use two pedal's when I want to blast at top speed.
There are some advantage's to using one pedal however, you can open and close the hi-hat which can really add to a blastbeat. For instance I like doing a jazz ride/hi-hat open/close pattern when I blast, it sounds pretty funky.