Tony Romo has drawn plenty of criticism for his quarterback play throughout his career, but he has certainly been a viable fantasy option. Whether or not Romo performs in clutch situations or big games is something that has been subject for debate, but neither are deductions from his fantasy value.
In two of the last three seasons, Romo has thrown for over 4,000 yards with 26 or more touchdown passes, while only throwing 10 interceptions or fewer. The exception year for Romo was a 2010 season in which a broken collarbone forced the quarterback out of the lineup. Romo's bad injury luck continued in 2011 when he cracked a rib and punctured a lung, although he toughed it out and stayed in the lineup.
The Cowboys took a step towards avoiding the negative impact that could come with the very real possibility of injury by signing Kyle Orton. While Orton is probably not worth a fantasy draft pick and should only be picked up if Romo goes down, the starter is certainly worth taking in a draft early.