It will be aimed at the intermediate guitarist.
Yes! This is what I need!
There seems to be loads of material out there for beginners, and quite a bit for advanced players, but not much for us inbetweenies.
Also, as Muttley says, the donation thing can work. I made my word processor "donationware" for a while, so I could fund buying extra programming components. I asked really nicely and got a huge response from people all over the world. Not nearly enough to give up the day job, though.
