Yes, atm the turnins at Memory Alpha is the only "crafting". I've heard they are going to expand it to be more like crafting in other games, but I've not really been playing lately to see if they've added anything or discussed it in more detail.
There are 3 "tiers" of item turnins at Memory Alpha.
The first tier is from the woman in the center of the base, the quest sends you to her.
The second tier is unlocked when you "buy" 7k credits worth of tier 1 items. There are three Tier 2 people, one engineer, one tactical, and one science. They all supply different items.
The third tier, are by the tier 2 venders. I never bothered to unlock this tier and when last I looked noone was sure how much effort it took to unlock.
Edited, Apr 13th 2010 7:38pm by Sarcin