asp.net mvc - strategy for including SEO information such as meta keywords and descriptions

I was wondering what, if there is one, is the best practice for including SEO content such as meta descriptions and keywords in an ASP.NET MVC (I'm using v3 RC) view. My initial plan is to create an actionfilter, applied globally to actions, to pull the relevant data from a data store and pass it as viewdata to the view.

My questions are: 1) Do you foresee any problems with this approach? 2) Are there any more suitable approaches? 3) what is an appropriate data store to use here - should i pull from the DB (or cache if the data is available), use resource files, config files, etc?

Thanks in advance,

JP