Today there was some news released about something Blizzard is working on that will be quite game changing. No, it’s not the dance studio. A “premium” service which will allow someone to use the Random Dungeon Finder (LFD) tool to group with friends on Real ID.
At first glance, I think this is an excellent idea. With WoW being so big across so many servers, there are people who want to group together but don’t want to take the time or money to level an alt on another realm or transfer a character over. By being able to bypass the tedius or expensive effort that these entail, it will allow friends to do dungeons together and have fun much easier.
The biggest thing that will cause most people to call foul is the fact that it’s a premium service, which is an extra fee on top of the monthly fee we already pay. To be honest, that was the first thing that caught my attention as well, but I’m going to wait for all the information. We don’t know any pricing or how exactly it is going to work, apart from the fact that only one person needs to have the service – that being the person initiating the group.
If this feature will be included in the current premium package which allows remote auction house and remote guild chat and keeping the price the same, I can see a fair amout of people using this. I could even see myself possibly signing up for this feature.
One big question I know a lot of people will have is whether this will support cross-faction groups along with cross-realm. Many of my friends are not only scattered across different servers, but between the Horde and Alliance. As much as the Alliance are scum (as far as my characters think), I’d like to group up with the people behind them. To me, I think this will be the selling point: if I’m able to do cross-faction groups, I’ll pretty much be sold.
Since this is still very early in the cycle of the feature, we’ll definitely be given more information later on. I’ll be very curious to see what the final version of this product will be.
Corath's Blog 
It was stated in the blue post about this that players need to be from the same faction to use this.
Looks like I have selective reading. Thanks for pointing this out! Makes me sad. 😦