Here’s a couple of helpful links:
http://dicey.net/revised/index.php?sid=6958f87ef38160f8b2a8d574ce308701
This contains the most recent official rules revisions to A&A revised. Some of the wording in the box rules allows for ridiculous strategies that make the game lame to play.
http://www.morrisongames.com/
This guy wrote a bunch of articles talking about what has changed in the revised version and such; it even has videos of him lecturing on it o_O I would completely disregard his writings/talk on heavy bombers since the rules revisions has diminished their abusiveness, but everything else he talks about is extremely solid.
Just my own few quick opinions:
Many old strategies need to be tweaked to work now. For instance, Karelia no longer contains a complex and the whole german/russian front is cut up a lot more. Also, you can no longer dump troops into western europe in one turn from the US because of the sea zone changes. Also, Germany is in a strong position to contest Africa if he does so quickly. But still the basics of the game remain basically the same: infantry are the foundation of land battles, techs generally aren’t worth the risk, Russia is playing defense, etc. The addition of artillery and upgrade of tanks gives you some leeway to purchase offensive units whereas before it was always infantry and nothing else.
Probably the toughest thing to get used to in revised is that the Axis has a higher chance to win now when they play smartly and aggressively. It is harder to defend Africa from Germany and it is harder for the US to get into action, and both Axis powers have increased IPC count. Battleships have also become a force to be reckoned with as they can take 2 hits before going down and repair themselves if not destroyed in battle.
I hope you have a lot of fun exploring the strategies that are open now; there is a lot going on now that has changed from the days of the doomed Axis and pure infantry builds. If you have any other questions let us know!