Welcome to the minecrafty wiki! I know it's a bit plain, but everything you might need to know about minecrafty is hopefully contained in these pages. A simple summary is found in the Introduction, and other stuff is found in the Minecraft launchers and Other functions pages.

Be aware that several of these launchers upgrade themselves on a regular basis, this may also include changing where they download themselves from. I don't currently track that behaviour, so minecrafty simply lists the last location that I got the launchers from. If you wish to have a more accurate location—for the Aether II launcher for example—then head off to where that launcher is advertised, and change the download location inside minecrafty for yourself.

I hope you enjoy using this. There are no plans to support using this under Windows, Cygwin or Mac OS X, as those are already well served by their current launchers. It also only starts java versions of Minecraft.