I took the existing grass tile and created some edges for paths. These would just add something else to the maps... Please post thoughts, as well as suggestions for additional edits for other tiles.
Full Version 1 Grass/Sand/Snow Edits
Just clean cut edges:

Version 1 Edits Example
Here is an example of the grass edges for a path and water using version 1 edits. Varying edges can be given to the paths as I tried to show, but they could be more straight if needed by not swapping the tiles being used for the edge.

Blue cliff tile IS a blue cliff tile cause I wasn't paying attention :/
Full Version 2 Grass/Sand/Snow Edits
Blended in edges (Angles need better fading - they look too sharp still and do not match the other tiles fading effects):

Version 2 Edits Example
Due to the tiles that are on map_tiles_2_1, they are already able to be used for dirt paths that blend in with grass or whatever tiles they overlay. However, they are only able to be used with dirt paths. Also, there is no T-intersection, and if you will look at the Main Crossglen map, you will see that they are just square tiles that do not blend in. I could have just edited one to match, but editing entire grass tiles that can go over any bottom layer was a better option. The top right section of this one show the grass edits being used with multiple ground tiles. These were done using version 2 edits on the bottom of the tile sheet at the top of this post. These tiles are faded in better. I have also included additional additional 45 degree sections. The bottom right path show that the angle can still be curvy, however can still be straight also like the path going to the house. The Y-Intersection can be done as big as needed for an area using these tiles too. I have cleaned up the edges to of the entire version 2 set in order to provide a better fluidity instead of how "choppy" the tiles look in the first image.

This adds a lot of additional tiles that can be used with grass alone. The process to edit all of these took about 6 hours. In order to properly fade the sand and snow tiles I am going to need additional time to make them look right. Both the sand and snow edits would essentially be replicas of the grass edits, so keep that in mind on why I have not completed them. This is a lot of work and I would rather have them used then do them for nothing. So if I can get a good number of votes on this I will make the corrections to sand and snow before sending them in for approval for the game. I do still have some additional grass tiles to make, but this should give a good idea of what everything is going to look like.
Full Version 2 Rough Example
A very, VERY rough example of some of the effects that can be done across different ground tiles with version 2 edits.

More examples
A simple test forest village:

blackwater_mountain32 map edit (Cliff edge tiles are just an example - they need re-modification in order to look like cliff edges. Need darker bottoms.):

Original blackwater_mountain32 map for comparison:

Additional Requests
Please note, if there are other tiles that can use modification, post the image name along with x/y coordinates (i.e. map_tiles_2_1 x5, y3) and I will see what I can come up with. It's alright if you don't know this information too, just try to be as detailed as possible so I can find which ones to modify.
Changelog
8-21-12:
- I need to re-work the angle fades to fade a bit more so the fading effect will match the other fading tiles. - Edges used for cliff, like in the Blackwater example should look more like over hangs with darker edges. This is going to require about 4 more tiles per set, but will look better when being used for cliff edges.
- Once I get all corrections completed I am going to keep the same poll but delete the entire original post, and replace it with better examples that use version 2 edits.
v.1.3
- Swapped out version1/version2 split grass sheet with original full version 1 grass/sand/snow tile sheet
- Added full version 2 grass/sand/snow edits
- Added rough example for full version 2
- Deleted references to tiles being used with water...current water tiles look better.
- Fixed angle tiles on version 2 edits so they wont stick out sides
- Added additional test village, and pre-existing map edit for comparison
v.1.2
- Swapped out tile sheet with 2 versions of grass edits only
- Posted second image using version 2 edits
- Changed polling options to have voting for version 1 and version 2 edits
- Formatted for clarity
v.1.1
- Added example tile sheet with grass/sand/snow edits
- Poll added