I've never seen a problem with carbon rims and standard aluminum nipples. I've only seen nipple corrosion on enve's. I think it may have been due to residual sealant that gets past the tape or something and it being able to contact the whole nipple.
Don't see why it would be an issue with standard nipples.
I just do not like the idea of having to run crazy high tension to save a few grams.
"I don't like them."
"They suck."
Apparently these statements are the same. Ti spokes work wonders for many riders. Going to disagree with you, again, on the "they suck" part. Pretty rad really.
Also, again, we're getting into the stage of much stiffer rimsets and much more durable eyelet areas. Ti spokes make a ton of sense paired up with this. The higher tension wasn't an issue on aluminum rims, I can imagine it being less of an issue with a material that can actually fatigue stress and still maintain a very stiff overall ride quality.
Either way, quarter pound saved over medium end spokes, of rotational weight, and have been shown in the past to be more than strong enough for the average Joe. This is the weight game thread. Get outta here with your hatin'.