Anyone know what kind of ability the reserve feats grant? Spell-like? Extraordinary? We're going with spell-like for now, but one of the players would like to know for sure as he would like to take some feats geared more towards warlocks that enhance spell-like abilities. Also, we weren't sure if him using Dimensional Jaunt while being grappled should provoke an AoO (If spell-like, yes). If it is a spell-like ability, what should the level of the spell be for purposes of Concentrate checks? Is it equal to the spell level of the spell in reserve? Is it one-half (round down) caster level?
EDIT: It looks like they are supernatural abilities. So that pretty much answers all my questions.