Personally, I enjoy the idea of Jolteon being able to do something like this:
Jolteon @ Life Orb/Rechargable Battery
Nature: Timid
EV's: 4 Def/252 Sp. A/252 Spe
-Thunderbolt
-HP Ice/HP Grass/Shadow Ball
-Cheer Up
-Baton Pass
Essentially, you play Jolteon to force a switch with it's deadly ass Thunderbolt, and you Cheer Up on the switch. Now they've swapped in a counter, and you're free to BP that off to something that can use the boost. Since Cheer Up is +1 in both offenses, it doesn't require a niche team to use this on, merely synergy. Rechargable Battery is another option for Jolt, but I'm not entirely sure if it conflicts with Volt Absorb. If it doesn't, in theory, you could get the +1 atk/+1 speed, then cheer up on the switch, and be passing +2 atk/+1 sp. a/+1 speed off to pretty much anything. Gyarados will appreciate the hell out of that.
The best thing about this particular set is, as I mentioned, you don't have to be running a dedicated Baton Pass team. You're essentially using Jolteon as a boosting scout that's still offensively competent on its own.
IMO, the Eeveelutions have always suffered from shallow movepools, and Jolteon getting a boosting move is a lot bigger than people seem to realize.