Sorry to hear your frustration...IT IS frustrating....
My PSA post surg had a similar pattern..... we did radiation and hormone therapy when PSA hit .25...BUT -- like a lot of post RP/ with radiation patients on this site, I had a postive margin, which I believe makes the docs pull the radiation trigger a bit faster...With a clean pathology and post rp PSA, the opinions tend to differ--- radiation will only cure local disease - which might still be your husband's case, it just really hard for them to tell at this point.....
Which doctor said no to radiation---the radiation guy or you primary uro? If its the primary doc, I'd be interested to see if the rad onc agrees. If radiation is truly off the table, I think they do wait around a bit get a better handle on your true doubling time....which is hard to get a good read on at these lower levels (OR SO I've been told)...if radiation is still a possibility, the lower the psa, the better....
Hope this helps--- fortunately, you have a lot of friends here eager to help!
Age 47 - pre-surgury PSA 39
Open Radical Prostatectomy 6/9/2006
Pathological Stage T3a, Positive Surgical Margin
PSA rose to .24 in November of 2006
6 month hormone therapy initiated December 1. 2006
36 sessions of IMRT Ended Feb 1, 2007
PSA as of May 25, 2007 undetectable
PSA as of November 29, 2007 undetectable
Next PSA May of 2008