So, there are all the different sorcerer bloodlines.
And in Dragon 351 there were rules for being a Dragonmarked Sorcerer, getting all the spells of your mark as extra spells above your normal known limit.
So, in an Eberron Pathfinder game, would a Dragonmarked bloodline for sorcerers be viable, with your mark's spells being at least the starting point for your extra spells.
Upsides: Cool, thematic, probably not overpowered compared to a normal bloodline. An interestingly different way to come up with the spells you gain from the bloodline.
Downside: Different Dragonmarks give you different numbers of spells, of different levels, whereas bloodlines give you one spell of each level from 1 to 9. There are already issues with making Eberron and Pathfinder work, this could make it even more complicated. It may be hard to come up with the bloodline special powers, especially the final one.
But it seems an awesome idea.
The bloodline skill should probably be the one that the Dragomark gives a bonus to. The feats should be a mix of those Dragonmark specific feats that transfer over, and some of the action point boosting ones.
I'm not sure what to do about the spells, possibly add some to some of the lists, or possibly go "It's a feature" and give them better other powers to make up for it.
Other powers... probably raise their caster level/extend all of their Marked spells. Beyond that... nick some stuff from the Dragonmarked book, and see what works.
I know this is very trough at the moment, but I thought I'd throw the idea out while I work on it some more, and see what people think.
For anyone who's interested, here's the numbers on number of spells gained per mark.
Order goes
Least Mark spell levels.
Lesser Mark spell levels.
Greater Mark spell levels.
Siberis Mark spell levels.
Difference in spell levels from 1,2,3,4,5,6,7,8,9 (bloodline default)
Detection:
0,0
4,2
6
8
= -25
Finding
1,0,2
3,4
6
8
= -21
Handling
1,1,1
3,3
5,5
5, 6
= -15
Healing
1, 2
3, 4, 3, 4
6
9
= -13
Hospitatlity
0, 0, 1
3, 4
6, 7
9
= -15
Making
2, 0, 1
4, 3
5, 5
8?
= -17
Passage
1,1,1
3, 4
5, 5
7
= -18
Scribing
0, 1, 2
3,3
5
8
Sentinel
1,1,2,2
3, 4
6
8
Shadow
1,2,2
3, 4, 4
7, 5, 6
8, 7
= +4
Storm
1, 2, x2
3, ?, 3
5, 7
9
= -9ish
Warding
1,2,x2,4
3, x3, x3
6, 5, 6
8
= -2
Have you come up with anything since this post? I liked the idea in Dragon, and have looked for a solution reconciling the idea with PF. My solution was to try to associate each house/Dragonmark with a specific (preexisting) bloodline, and add the mark's associated spells to the class spell list, taking away either the Bloodline Arcana or the Eschew Materials bonus feat (haven't nailed down the numbers yet, as to which is appropriate). Add three special feats to the bonus feats list (one each for Adept, Prodigy, & Visionary lists to add those spells to the class spell list (yes, class spell list rather than spells known; still working on it). The Marked Sorcerer can take a Mark spell (those from his main Mark list as well as any from the extra feats she's taken) in place of a bonus spell of equal level or higher.
Side note: Wind's Favor showed up as a Drd3 spell in Magic of Eberron, if that's the "?" in the Lesser Mark of Storm list.