Yup, I noticed when I checked the Rule 5 candidates, I didn't find a single obvious candidate. I could see Culpepper or Armstrong, but even then it's a stretch. It's the first time tracking this that I could absolutely see zero prospects get protected.
My DFA list:
No-brainers: Sabato, Wallner, Gray (out of options), Orze, Acton
On the fence: Nance (high WHIP and will be 36), Festa (if he's not close to pitching, no need to use up a 40 man roster spot, it's not as if Canterino was ever poached in a similar situation), Anderson (I think he has the upside to be a decent middle reliever and he has options)
Trade Candidate: Larnach, Ryan, Ober