Official Google Webmaster Central Blog: Google does not use the keywords meta tag in web ranking
So can we officially put the keywords meta tag to rest? Whatever Google does, everyone else follows, and I seriously doubt the other search engines are using them either. Every time I see them in a customer's site I cringe because I'll know they want me to keep them. I have many customers who spent hours and hours of weekly meetings and collaboration to come up with these keywords. But I think it's time to start phasing it out.
I'm glad google announced this, because now I can show this page to my customers!
I know the keyword tag has been ignored for a while, but the description tag is still being read to use for your SERP description. So those are what you should pay attention to. But don't try to load up your description with keywords, use it to grab the attention of the searcher! That's what will really count.