I have access to bags of pine sawdust. I already looked at the thread about sawdust which mentioned uses for sawdust used for the bottom of garden beds, however, pine's not ideal for that unless maybe for blueberries. Can anyone think of any other uses? Another idea I heard is to leave conifer shavings under the sun for a year to remove sap/resin then to grow shiitakes or other mushrooms on it.
Just to clarify, are you taking about sawdust (dusty fine particles) or shavings (tiny flat bits of wood, sometimes curled a bit)? I think the uses could vary significantly between the two.
I have lots of pine shavings and I use them for animal bedding. I'd be happy to use them to mulch plants and cover garden paths as well. I wouldn't be worried about the acidity, I think even pine needles don't contribute much to the acidity of the soil.
"Hundreds of years from now it will not matter what my bank account was, the sort of house I lived in or the type of car I drove... But the world may be different because I did something so bafflingly crazy that it becomes a tourist destination"
I do the same as Mike, bedding or mulch.
Recently I have also started using pine shavings/sawdust as the paths I walk on in the garden. It stops me from compressing the soil and after a few months I can just shovel out that aged sawdust right onto the beds (and replace it with more).
You can build a stove designed to burn it. I'll embed a few of my favorite youtube examples of indoor heating stoves. For an outdoor cooking stove, it looks like you basically leave off the top and the stove pipe. Looks like they burn pretty clean, like a rocket stove, though probably not as clean as a rocket mass heater.