Playing 4-color Jeskai Tempo/Control and it seems to be faring pretty well. Tested favorably vs. R/G Landfall and Abzan Aristocrats. Running 11 fetches, is kind of rough, but the mana ends up working out more often than not. The ability to play mantis rider / jace backed by kolaghan's command and crackling doom is stuuuupid. List incoming shortly.
Jeskai Midrange.dec, Built with Decked Builder
http://decks.deckedbuilder.com/d/113814
Haven't had any issues with the mana, really, with all the fetches I can get anything I want, normally just basics, so I can play stuff in turn 2-3, and turn on the tango lands later in the game. There are totally awkward draws though.
Currently debating cutting a Gideon for an extra Bloodstained Mire. If not, maybe another Gideon in the SB instead of Sarkhan.
Let me know your thoughts!