Let's just roll something random, and try to find an explanation for the results...
Playable Races
Humans: recently developed civilization, concentrated in grasslands and plains; relatively undeveloped magic, society focused on trade
[classes: Ftr, Rog, Wiz(Abjurer only), CloCle]
Desert Elves: all the few existing elves are descendant of a very old (egyptian-inspired) race and live barricaded in a few big crumbling cities in the middle of the desert
[classes: Ftr, Rog, Wiz(Abj/Con/Ill), CloCle]
Desert Half-Orcs: nomadic tribes and main adversary of the Elves
[classes: Ftr, Rog, SavBrd]
Elemental-Water Half-Orcs: a small group of Half-Orc that has over-developed their Water bloodline (see below); these few individuals usually live in extrememly secluded areas underground
[classes: Ftr, Rog, Wiz(Abj/Con/Ill), CloCle]
Jungle Dwarves: all Dwarves are an aggressive savage race that lives in the deep of the jungles
[classes: Ftr, Rog, SavBrd, CloCle]
Elemental-Earth Kobolds: rumored to be orignated as offsprings of evil dragons, all kobolds were magically transformed to be attuned to elemental earth many generations ago, in order to contrast the essence of water and life that flows through the other races; they are the main nemesis race of the world (rare good renegade individuals are possible)
[classes: Ftr, Rog, Wiz(Abj/Con/Ill), CloCle]
Dromites: a mysterious ancient race that lives mostly secluded in the highest mountains and sports psionic powers
[classes: Ftr, Rog, Wiz(Abj/Con/Ill), CloCle, Psi]
Maenads: an interloper race only recently (less than 30 years) arrived into the world from another dimension; possessing psionic powers, they claim some very ancient legacy with the Dromites; currently there is no Maenads society yet, and they live scattered throughout human cities
[classes: Ftr, Rog, CloCle, Psi]
Bloodlines
Elemental Water: e.w. represents the power of life that flows in every living creature; any race can have individuals who are born with a supernatural display of this nature. The only exception is Kobolds, who have purposefully tried to forsake it. For some reason, the Half-Orc race (perhaps because the only half-race in the world) had a group of individuals who displayed an even greater affinity with e.w., and became truly water creatures.
Black Dragon: the most common type of dragons have in the past tried to mate with humanoids in an attempt at corrupting their societies. Any base race can have this bloodline except Maenads who haven't been around long enough.
Doppelganger: true doppelgangers don't exist anymore, but their bloodline is still relatively common (humans only)
Classes (summary)
Fighter: all races
Rogue: all races
Wizard (Abjurer, Conjurer, Illusionist only): elves, water half-orc, kobolds and dromites (all 3 types), humans (abjurers only)
Psion: dromites and maenads only
Savage Bard: desert half-orcs and dwarves only
Cloistered Cleric: all except desert half-orcs