LA +3.
Those stat adjustments are NICE, and if you compare to the dark elf at +2, way better (without a single negative, even!).
You guys are cutting Cold Iron/5 way short. Remember, there is no "catch all" material and for a PC this power alone is LA +1 or +2. Against I'd say easily 50% of your enemies it will be equivelant to DR 5/-. This power is like the sniverblin's +4 dodge to everything, its huge.
Also, lets not forget +4 Nat. Armor. Dark Elves have SR so they both have defenses (with their ups and downs) but I'd say +4 Nat Armor is more powerful, all around (especially at lower levels).
The natural attacks don't count, and pipes don't count if you don't let the DC increase.
+4 to a bunch of skill checks is, once again, better than the dark elf. Dark elves get +2 to 3 skills, satyrs have +4 to 5 skills, a difference of 14 (!) skill points. I would say this and the stats could be LA +2.
+10 base speed is also a nice bennie, not nice enough for an LA on its own, but not as insignificant as most race's bonuses (Orc Blood? +1 attack Goblinoids?).
Overall I would place them at a +3 LA, solid, without class levels. If you add in the pipes they make for a weak +4 LA. Compare them to the half-dragon template, half-fiends, and some other LAs. Honestly the best route is probably just to take the satyr levels (with an LA +2).
Technik