Hmmm, only 0.3 mcg? That's not bad...in fact just a trace amount. I always dilute 1 packet with 32 ounces of water and ice, so it's quite watered down.
According to this site,
How Much Caffeine in Drinks -- Coffee, Tea, Soft Drinks -- Caffeine Content 8 ounces of 'regular' iced tea has 47 milligrams.
edit: After some googling, I found out that 1000 micrograms equal 1 milligram. So truly, the Special K iced tea has a trace amount of caffeine...you could actually drink over 140 servings of it, and it still wouldn't be as much caffeine as 8 ounces of 'regular' iced tea.