IUD and Birth Control

I have been doing some reading on the IUD for birth control. I thought there were two types available in the U.S., but one source is telling me the only option is the Mirena brand. Can anyone provide any feedback on the IUD, good or bad? Shoot a comment to the blog...

Based on my reading, I am wary of using it the first year since I want to breastfeed again. Long term breastfeeding rates appear "iffy" at first glance. Hmmmmm. Besides, a part of me wants to stay and has stayed far away from hormonal BC... I hated the affects of the Pill, but I know hormonally the Pill is different from the IUD progesterone-only... The pros of the IUD are appealing...

Interesting contradictions here on Wikipedia for nursing mothers. As usual, Kellymom.com has some good info also.