Just a small bug I've noticed while using Omni, the "while" keyword doesn't get highlighted blue like other control structures.
Crash bug: When you have a category (or a folder) that is already at the bottom of the list (or technically the top of the list), and you attempt to move that folder to the bottom of the list, the Omni editor crashes.
To reproduce this easily, open any map, pick the last folder, and move the mouse until you see the red line at the bottom beneath the folder you selected, click and watch it all burn down.

midiway Regular Shmoe@PhiSC2: Go At some near time I will publish a proper SDK, it is just not ready. But if you already want to learn how to write those plugins before the SDK is released, which is something you would want to learn anyway, start looking at how I wrote Ion, the source is here.
Note that I expect people interested in making plugins to know a bit of C and compiling DLLs for Windows. Main thing to start understanding is the header file for the DLL here.
There is no such thing as you imagine: "how the dll loads the map file", when the map is saved, Omni calls exported functions of the plugin DLL to it do certain things, thats all for plugins.
I will describe what I will let plugins do when the map is saved:
Also plugins can write an interface for the user in form of a panel (as the panel of Ion plugin) which is coded in HTML. The HTML supported is the one of this library, it also supports a scripting language similar to Javascript. I plan also to make a D version of the SDK, just because I am learning D.
As for the requests, already added the one you asked for hidding that space, just wait for the next version. As for the Data tab, havent considered that, and so I am not willing to make it, so many things planned to do ... right now I am working in a widget for showing a list of natives, also I am studying how to write a parser for Galaxy with ANTLR. But you could write with my help a plugin for that ...