Map for a Novel for an example from RobA. Also, someone else had a recent post in the past few days in color with similar style hand drawn forests.
Also, one of the things I have been playing with a lot in the past few days for hand drawn mountains is using the smudge tool within GIMP. In the featured map section this map comes from http://www.cartographersguild.com/fe...anthriaMap.jpg, has a link to a GREAT tutorial off site for how to make this style of map. Now, I know your map is not this style, but I really like the artists style of using the smudge tool to blend and I have been getting some great results with B/W hand drawn mountains using his technique. Not sure how well it will work with color, but if you like it, it may help blend the hard lines a bit better where your mountain meets the flats. It takes a bit of practice, and is a lot easier with a tablet and pen, but it can be done with a mouse if you take time and care.
Of course, this is just my opinion and suggestions, so it won't hurt my feelings if you don't them. I am just kind of anal about side view mountains and top view forests on the same map. Most of the time, it just does not look right to me.