Oooo, that's tough man. Ronnie Brown has like 350 yards and ONE TD on the season. If you are desparate at RB, I could almost see it.....however....I can't justify moving a a WR you likely got in the 2nd round for Ronnie Brown right now.
Yes, Romo is gone and that CERTAINLY hurts Austin's value, but don't sell at rock bottom. He's still #1 on that team and Kitna is not Brad Johnson. Yes, that offense looked terrible with Romo out, but with a week or two of practice for timing and what not, that offense will still move the ball. Which has NOT been a problem this year despite their record.
If you are just positive that Austin will not produce without Romo, then give it a week or two and see if he'll post some numbers so that you can sell higher. R. Brown wouldn't see the field on my team. (Torain has the same yardage and more TDs on the season and has been the starter for only 3 weeks now)
In short, reject it and look for better value.