The google docs link is protected by security at the moment, Will. If you're unfamiliar with how it works, in the top-right corner of your browser there should be a "Share" button under your e-mail. Open up that dialogue and change the access function to anyone who has the link. It might sound like you're giving people permission to edit the document, but you're not, it's just worded poorly. An additional set of options will come up after changing the access to this which will determine who can edit it if anyone. One thing you could do, though, if you wanted to approach climates and other plant/animal life zones in a semi-random way (and since you're basing this off of Earth for ease, simplicity, familiarity -- whatever) is to pop the image into one layer of an image program, and start drawing the climate zone lines on another. Use a dice roller to determine how much a certain section of that zone will "reach" or "be eaten into". You could use 50 on a d100 as a baseline, and for every point under 50, you erase a bit of that climate for a certain area; for every point over, have it reach up into the next adjacent zone. Do this before you plop down mountains and rivers and you can move them around to fit in with the new zones created. Realistic climates and everything that goes along with it is probably the most difficult part of doing world building like this, in my opinion. You have to set out certain things early and you can easily pigeonhole yourself if you don't think far enough ahead. Hell, we have an entire branch of science devoted to just figuring out how the climate works on a planet we understand more than any other. After you do some decent reading and come up with something that seems acceptable, you could even go as far as submitting the map to some sort of climatology or ask science forum and get some feedback on what does and doesn't work if you really wanted to get into it.
