Update!
I managed to get it to run. Performance is horrendous, but a higher end Chromebook with 3d acceleration support will get the job done. Here's what you have to do.
1) Install the Oracle JVM. Instructions here:
http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html2) Download the minecraft launcher and run it once, allowing it to update and then crash.
3) Install libegl1-mesa. Run the command "sudo apt-get install libegl1-mesa" in a terminal.
4) Download and compile LWJGL for the ARM platform. Instructions are found here:
http://rogerallen.github.io/jetson/2014/07/31/minecraft-on-jetson-tk1/5) Patch Minecraft with the libraries that result from the compile. What you need to do is this:
--- 1) Find the working directory for Minecraft. This is typically ~/.minecraft
--- 2) Navigate to the "versions" folder. Make a copy of the version folder you want to patch and rename it "x.x.xarm" (x.x.x being the version number)
--- 3) Open up the copied folder and change the jar and json files inside to the same name.
--- 4) Open up the json file and append "arm" after the version number for every instance of an LWJGL library you find inside (disregarding nightly builds)
--- 5) Navigate to ~/.minecraft/libraries/org/lwjgl/lwjgl and there will be a folder for each library inside. In each of those folders you'll find a folder marked with a version number. Append "arm" to the end of each.
--- 6) Replace the libraries inside those folders with your new libraries. When you reach "lwjgl_platform", you need to break open the .jar file and delete every library except for "liblwjgl.so". Replace that with your new ARM compiled version.
--- 7) Make sure that everywhere you see a version number (typically 2.9.1) you append "arm" to the end. This is mostly so that the minecraft launcher has no idea what the files are and doesn't attempt to update them. If you patched the json file correctly, it'll still run.
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Start the game! I might make a shell script soon that does all this for you if the instructions are too complicated.