So, I was fiddling around with a malconvoker / summoner build, and was wondering if Summon Elemental, the reserve feat from CMage, would produce Orglash Air Elementals if the summoner had Rashemi Elemental Summoning.
From Summon Elemental: The elemental acts as if summoned by a summon monster spell (PH 285).
From RES: When casting a spell that summons air or earth elementals ...
The RES text indicates that it doesn't work, since your elemental comes from a reserve feat, not casting a spell. But the word of the reserve feat indicates that you should treat the elemental as if it were summoned by a spell, possibly triggering the RES feat.
It doesn't seem all that broken even if it does work - the Small Air Elemental, if it got Orglash'd, would do 2d6 with its cone of cold. You can do better with other reserve feats, just take Fiery Burst instead. But if you're taking RES anyway, for your regular summons (probably not as a malconvoker, but maybe as a normal summoner), it might be kind of cute.