What is the cooldown on companion gifts?
In Star Wars: The Old Republic, you can buy or acquire gifts for your companion characters. You can't give your companion a gift immediately after giving them one, but there's no cooldown indicators like there are for, say, medpacs.
How long do I need to wait between giving my companions gifts?
I don't know if it's changed since January, but it was 30 seconds when I was playing. I'm pretty sure it puts a debuff on you which you can hover over to see the countdown.
This changed in Patch 1.2. There is no longer any cooldown, and the activation time is 3 seconds.