This list repeats some items already mentioned
Portal to the old Greeting Hall
Something interesting in the old backyard training areas
Minimech leet pets
Org-only beacon warp
(placeable by org president, useable by any org members using inexpensive beacon device).
Long cooldown (think: hi-level faction change cooldown times) and some restrictions on where it could be placed. New org members would be able to instantly warp to their org's home/hangout, infusing them with a greater spirit of comradre.