There really isn't anyone in the world who can tell you much about the 4E FR setting, because it isn't really FR anymore. All the information available for it is contained within the 4E sourcebooks and the occasional Dragon article; all the older information has been rendered obsolete, with dramatic changes in geography, politics, demographics, theology, cosmology, and the way magic works. At best, some of the older stuff may appear in the form of ancient ruins and such, and I'm sure your DM wouldn't be appreciative if we gave you the rundown on the major adventuring locations of the FR of old (to whit, many of which no longer exist at all, having been destroyed or changed by the Spellplague).
Approach it as a generic points of light game and you won't do much wrong. The rest is up to your DM to fill in. That was the stated goal of 4e FR designers - to make the setting more accessible to new players by eliminating most of its "overly rich" history and details.