Hey I just started a gnome rogue and I decided too put more points into dexterity than strength. At higher levels would this matter at all when your statistics are maxed out ? I was also wondering if the innate aa abilities such as innate strength for example would attribute too your character when your statistics are maxed out ?
They make no difference - gear alone will max your stats. So initial choice of stats is unimportant, and spending stat increase AAs is a waste of a perfectly good AA. They may make a minor impact at max level with max AAs and raid gear: perhaps. But spending on stat cap raising AAs is a good move, when you get the option.
Stat cap AA should not be underestimated. On a per-AA-point basis I think STA/INT/WIS are a better bang for the buck than General Sturdiness and the mana pool equivalent one whose name I can never remember.