Plane Sailing
Astral Admin - Mwahahaha!
I was struck by a potential untapped market in metamagic feats - those that lower the spell slot required by a spell by restricting some aspect of the spell (rather than increasing an aspect) 
Some possible examples:
Reduce Spell - Reduces the range of a spell that is normally Medium or greater to Close. Spell is prepared as if 1 slot lower.
Singleton Spell - Makes an area effect or multi-target spell affect only one target. Spell is prepared as if 1 slot lower.
Compress Spell - Reduces the duration of a spell. One that normally lasts for hours lasts for minutes instead. One that normally lasts for minutes lasts for rounds. One that normally lasts for rounds lasts for just 1 round. Spell is prepared as if 1 slot lower.
Minimise Spell - The spell does minimum damage. Spell is prepared as if 2 slots lower.
Thus a 5th level caster could cast a Minimised Fireball as a 1st level spell, doing only 5 points damage (half on a reflex save). He could cast a Singleton Fireball as a 2nd level spell which does the normal fireball 5d6 damage but only to one target. He could cast a Reduced Bulls Strength as a 1st level spell which lasts for 5 minutes instead of 5 hours.
I freely admit that I haven't considered what the implications are for every spell on the list
However, I thought the idea might be interesting enough to share with people at this point.
As a balancing factor one could rule (for instance) that you cannot reduce a spell below its normal spell slot level but one of these feats could be used to offset the cost of a normal metamagic feat. For instance - a Reduced Empowered Bulls Strength which only lasts for 1 minute per level but gives 1.5x(1d4+1) onto strength. Or a Singleton Maximised fireball which is prepared at 5th level (instead of 6th) and does max damage to just one creature.
I could imagine a lot of interesting flexibility that arises with this (and since people can't learn higher level spells before they reach certain levels it *isn't* giving "early access" to high level spells - just giving magic users an awful lot more flexibility in how they mix and match their spells together..
So what do you think?
(dons special cape that automatically Minimises, Reduces and Singletons incoming flames
)
Cheers

Some possible examples:
Reduce Spell - Reduces the range of a spell that is normally Medium or greater to Close. Spell is prepared as if 1 slot lower.
Singleton Spell - Makes an area effect or multi-target spell affect only one target. Spell is prepared as if 1 slot lower.
Compress Spell - Reduces the duration of a spell. One that normally lasts for hours lasts for minutes instead. One that normally lasts for minutes lasts for rounds. One that normally lasts for rounds lasts for just 1 round. Spell is prepared as if 1 slot lower.
Minimise Spell - The spell does minimum damage. Spell is prepared as if 2 slots lower.
Thus a 5th level caster could cast a Minimised Fireball as a 1st level spell, doing only 5 points damage (half on a reflex save). He could cast a Singleton Fireball as a 2nd level spell which does the normal fireball 5d6 damage but only to one target. He could cast a Reduced Bulls Strength as a 1st level spell which lasts for 5 minutes instead of 5 hours.
I freely admit that I haven't considered what the implications are for every spell on the list

As a balancing factor one could rule (for instance) that you cannot reduce a spell below its normal spell slot level but one of these feats could be used to offset the cost of a normal metamagic feat. For instance - a Reduced Empowered Bulls Strength which only lasts for 1 minute per level but gives 1.5x(1d4+1) onto strength. Or a Singleton Maximised fireball which is prepared at 5th level (instead of 6th) and does max damage to just one creature.
I could imagine a lot of interesting flexibility that arises with this (and since people can't learn higher level spells before they reach certain levels it *isn't* giving "early access" to high level spells - just giving magic users an awful lot more flexibility in how they mix and match their spells together..
So what do you think?
(dons special cape that automatically Minimises, Reduces and Singletons incoming flames

Cheers