A long time ago, back when I used to play with my action figures (i think that would be yesterday..lol), we did alot of stuff with robots, androids and their rights as people. Eventually, androids and most other intelligent (sentient) mechanicals were given the same status as organic, intelligent beings (this included clones and geneticly created races, of which we had a couple). The androids, seeing that they didn't have a "culture" or homeworld of their own, set up shop on an uninhabital planet, and began to create a culture that was their own.
All this talk of manufactued sentients, and no one has brought up one of my favorite scenerios: Starfleet comes across V'ger's "machine planet! V'ger assumed that the ENT was a 'lifeform', so they might make the same mistake. Would the FED be ready to encounter a race that might consider them a 'infestation' and not a group of sentients? And how would living, thinking machines feel about seeing something as advanced as the ENT totally controlled by primative biological beings? (I see Data as the Ambasador to the machine world)
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"Yes, it's the Apocalypse alright. I always thought I'd have a hand in it"
Professor Farnsworth