So, after much research, mostly uneccessary, I found a coupple of things. The best air filters for the dust problem come from K&N filters. They replace the air boxes on most vehicles completely, and are well known in the ATV and racing industry. The filters get sprayed with oil to help collect particles. Amazingly, they appeaar to increase airflow and horsepower as well as being better than paper filters. In additon, there is a cloth sock that goes over the filter. That sock can be frequently removed and shaken out. The oiled filter alone would need to be washed out and re-oiled, probably several times, on the playa without the sock.
other fun facts; there are several air itakes on some motors, like the one for the cluch on this buggy, that also need a cloth filter to prevent dust from accumulating in the cluch. There also seems to be an extra proceedure for cleaning the chain that might be useful for bikes as well. Apparently racing dirt bikes have a chain cleaner and lube that leaves the chain 'dry', so that the lube oil on the chain doesn't attract dust and turn into mussy sandpaper. This might help some folks not have to replace bike chains post-burn.
All the mechanics I talked to said basically similar things. Playa dust will ruin wheel bearings and head-sets. But, the dammage is usually not critical unless left uncleanned once the machine is off-playa. Well oiled parts get slammed the most because the oil traps the dust, turning lubericant into sandpaper. Most critical part is not letting the engine breath the dust, or get into the crankcase oil wher it will wear on the rings and such until the motor is flushed completely.