Since threads actually concerning the TSL seem to be becoming scarcer I thought I would try to inject some relevent points into the General Discussion Forum.
Here's what we know:
Colours
There are going to be 10 standard colours and an undetermined number of special colours.
The standard colours we know that will appear are: blue, green, yellow, red, purple, white/silver.
The special colours we suspect to be in are aqua and orange (Mantle of the Force and Heart of the Guardian).
Hilts
There are not going to be customizable hilts (last I heard), although it is possible that some hilts may differ slightly (your own lost lightsaber for instance).
Upgrades
The lightsaber now has 6 upgrade points: colour crystal, 2 attribute crystals, lens, emitter, power cell.
Stances
Stances are not simply chosen, you have to earn them.
Stances will affect your offensive and defensive properties.
There are at least 5 different stances.
The stances are affected by your force powers (according to Akari's hunches).
If anyone has any additional information then I'll update this post so you don't all have to wade through post after post to get to a single sentence. Thx alot.