We just spent time with our neighbor's son who is 9.5 months and he says "thank you" (or "tan to") when you hand him something and "cat" or "kaa" when he sees animals. He's very tall (he looks like a toddler, not a baby!). Our son knows words (when we say them) but babbles more than anything else. He definitely doesn't say thank you!
Re: Any babies talking yet?
My lo will be 10 months on Dec 15th and right now says mama, dada and what's this (a "wazzit" sound when she points at something new).