how many keywords is over stuff?
If you over stuff the keywords, your website will be penalized. It is important to use keyword variations for getting best results.
Meta keywords are useless but also harmless if you still add them.
Meta descriptions on the other hand are still very valid for SEO.
You read their blog. You read the articles on seo.alltop.com. Google now makes over 600 changes to their algorithms annually. It's a dynamic monster that will eat your site alive if you don't pay attention. You can't get your site to page one and forget about it. You have to stay on top of all of Google's updates constantly.And how you keep track of Google's fashion updates?