So... now that I've gotten the spellbook figured out, where should I go with this character in the future? The focus of the game he's in is exploring and mapping weird dungeons, which will include planar pockets with odd geometry and more than 3 spatial dimensions, and is expected to be very dangerous.
Starting out he's a:
dragonwrought (blue) desert kobold wiz 4/cl.cleric 1/unseen seer 1
He'll be a capable scout, trapmonkey, and overall utility/BFC caster, with some damage capacity.
Feats:
Improved Initiative (Diviner ACF)
Dragonwrought (RotD)(1)
Spell Mastery (flaw 1)
Mercantile Background (flaw 2)
Uncanny Forethought (Exemplars of Evil)(3)
Knowledge Devotion (CChamp)(traded Knowledge domain for this)
Planar Touchstone (Catalogues of Enlightenment)(6)
Due to feat requirements, I'm starting out with the 4 levels of wizard, then a level of cloistered cleric to get Knowledge Devotion for free, trapfinding (kobold domain), and the skills required to enter Unseen Seer. Some of those 1st level cleric spells are also amazing. Eyes of the Avoral, anyone? Or Sign? Omen of Peril? And it lets me use cleric magic items without sinking ranks in UMD. With the kobold and trickery domains, I can also function as the party scout/trapspringer.
With Uncanny Forethought, a big Int score, and a fat spellbook, he'll be able to have nearly any spell he needs on the fly, especially with the Planar Touchstone feat giving him access to cleric domain spells. I'll eventually take the 5th wizard level for Spontaneous Divination and pick up Versatile Spellcaster, for even more spontaneous casting capacity.
I banned enchantment and necromancy, so a mindbender dip for mindsight is out, although I could always get an imp or psuedodragon improved familiar and Psychic Reformat them to pick it up if I really want it to add onto my scouting capacity. I guess taking the feats from LEoF that let you cast from your prohibited schools would open up his options even more, also.
More Unseen Seer is a fairly obvious direction, and probably what I'll wind up going with, but I want to explore other options. I'll at least go far enough to get the first Advanced Learning (or whatever it's called) to pick up Hunter's Eye for more SA, but it would really be nice to be able to persist that sucker. The easiest way to do that is probably Incantatrix 3, but I haven't taken the feats for that.
I also thought about Mage of the Arcane Order to build on his "toolbox" nature. Even if he didn't have a spell that he needed in his spellbook, he could pull it out of the Spellpool. I could also cheese this a bit to be able to scribe those into his spell book using Rary's Mnemonic Enhancer or something similar. I think this is a bit redundant, though, at this point.
Likely this stuff won't come up in this game, as it's a PbP and those are slow as molasses. So I'm mostly just brainstorming about this build's capacities.