but what do you all think about "CD's"?

This is a bit prescriptive, so look away now. "CD's" should be used in two contexts, possessive and contractive:

possessive: The CD's new songs are X and Y.
contractive: The CD's pretty new. (CD is)

Plural of CD should be CDs. We don't put apostrophes on the plural for cat or dog. Why should CD get the hallowed risen comma?

Brandon