If it pertains to Shadowrun, this is an excellent place.
Otherwise, there are plenty of writer's forums around.
Of course, there's a bunch of writers around here as well, they might be inclined to offer you some help. I know I'll be happy to give whatever you have a look and offer thoughts, I fear I'm not too much of a prose critic though. Tends to be better than my SR rules fu though, for what that's worth.