We all knew it wouldn't be long, and now the first custom Android Wear ROM is available for the LG G Watch. Because the bootloader is unlockable and the G Watch uses fastboot, developer jakeday was able to whip up the Gohma ROM instead of spending time worrying about how to unlock the device and get access to the system.
Of course, because we don't have any source code for Android Wear yet (we're hoping) it's based off the stock firmware. The developer does tout better battery life and improved performance from his ROM, though.
If you want to give the ROM a try on your new G Watch, head to the source link below and give it a good read.