Well-written and well-thought-out article on how to find common ground between EA and Agile.
One of the recommendations is to have an architect on every project team (or one for every few projects) to help ensure that the project, done in an agile way, is still in alignment with the enterprise architecture.
This can be expensive, of course, but then, having an architecture that isn’t used, or having teams that don’t deliver useful software is also quite expensive.