Any sort of idea/info in regard to what the XP Cap will be for level 30?
I would assume about another 2.5 million xp considering the current curve.
In any case, I'd say, now is the time to focus on Epic PL and Iconic PL Feats while they require much less xp
Edit ( as pointed out by Arianka) :
it would take another 3.150 mill according to the curev. ( see curv here http://ddowiki.com/page/Experience_points )
1.5 mill for 29 + 1.65 Mill for 30 = 3.15 mill.
9.750 mill totl exp to go from 20 to 30.