It will be a LONG slow road but they might get there eventualy. After logging some time in plat version i see nintendo moving things forward a bit on the online side of things and gen 5 will be more telling as to what we can expect in the future. The real rub lies in the fact that Nintendo wants player interaction to be family friendly, and as long as there are douchbags like the ones i keep running into on the WOW servers out there i can't see nintendo hosting a game as open as an MMO would have to be. Friend codes and Wii speak didn't just fall out of someone in Ninty HQ's ass, they were though out and exuctued plans, and anybody hopeing they will just disaper because the 16-32 demographic doesn't like them had better not hold their breath while they wait.
Also if we ever do see a pokemon MMO, it will most likly be on a handheld, seeing as that's really where the heart of the series lies. here's to hoping the next gen handheld can pack enough punch to at least keep us dreaming........