Its an interesting thought, but this project does help raise a couple of interesting questions for such a project:
1) A "Market" as it stands, can only truly be obtained if one were to set party on or openly trade in the wilderness. What you say is one factor that can be addressed from this project -- The land-claiming abilities, and what it could use to improve upon (one such idea being temporary claim for such a "hard-coded" thought I'm trying to do).
2) Land controls, at the moment, are not fully implemented obviously. This project does aim to reveal what can and can't be done with the current alpha build, and it obviously shows that players have no true option of forming the land to their will, but they do have a limited ability to change what they walk under. This also brings up another interesting, yet sadly "hard-coded" idea: A building planner.
3) While there are many simultaneous objectives here that are proving very difficult, making a community effort to create such a thing, even in the alpha stages, can really set people together and uncover different things. Being big and experiemental, this idea isn't simply trying to be "hard-coded"; If anything, its trying to use what is available to its full extent, and pointing out implicitly what current flaws the system has, and what could be done to improve it.
Though, I do appreciate your objection -- Its fun to hear why its a bad idea, and it does make me think more about this project. However, I believe I'm going to continue this project, and perhaps do it again when a map wipe comes and goes.
EDIT: It appears I totally screwed up the claim space that originates (it starts off 5x5, not 8x8!), so back to the drawing board! The design remains, but will be changed shortly.
EDIT x2:
http://img.photobucket.com/albums/v322/Blac_Slayer/TemplateMarketplace-1.png?t=1244267085New design, and its much smaller -- 4 times as small even =P Which means take all of those big numbers and divide them by four and now you have your much more compact market! 3x3 spots can even be claimed, taking the grass around it (only one spot conflicts, but that's still in planning about if I want it or not). Comments, complaints, questions?