Personally I wouldnt say there is much of a market, not in GA. Firstly, its best to do all the planning yourself, then you can evaluate danger areas, weather, diversions and so on, and have extra additional information in your head based on what you picked up while doing all that. Plus, I make the ultimate go / no go decision, and am responsible for what I do in the air - so I generally wouldnt want, or trust anyone else to do all the planning for me and then just shoot up into the air. I dont mind using various low price bits of software (SkyDemon, RocketRoute and so on) to generate some of the information - but I spend as much time double checking it, as I would creating it all in the first place really.