I just made it to 1066 after starting as Ivar the Boneless. Completely ignoring Scandinavia/Britannia, which I've conquered:
-The Middle East actually has settled down somewhat. The Nassibids in are Shiite and own all of Egypt through Tunisia, and up the levant through Syria. The Hashimid Kingdom of Arabia owns that whole penninsula. Persia is mostly united, and the Seuljuks invaded north instead and sort of became the new Cumans. Byzantium's borders look nice and clean too. Funny enough, a Greek/Orthodox branch of the Ynglings have been ruling it for a while.
-In Spain, Asturias inherited Aquitaine somehow, then wiped the Ummayads off the face of the Earth except for one provice. Then they pressed a claim to conquer France and now own most of both Spain and France, except for Brittainy, Normandy, and Poitou which my vikings conquered on their own.
-Italy is super clean, with Byzantium owning all of its de jure territory in the south and the Kingdom of Italy controlling the north. The Papacy is still independent with 1 province.
-Central Europe is a mess. Germany/Lotharingia could never get going, and Italy owns some splotches here and there from pressing claims and gavelkind succession. My vikings took over northeast Germany on their own (that's getting to be an issue, I don't want to expand this fast!). Carpathia formed after the Tengri Reformation and invaded Bavaria, now it looks kind of the old Austrian Empire (its eastern holdings got taken by the Seljuks).
-Poland and Russia are divided into several Slavic/Suomenusko principalities. The Kingdom of Rus exists, but the ruler is Mordvin.