Dear Mike,
I'm sorry to hear about your ongoing problems. I'm in Europe and there's been a debate going on for many years with European experts declaring that MMC is just as good for bladder cancer as BCG, except that BCG clearly is superior with CIS (carcinoma in situ) if maintenance is used.
There is a big load of info about the usefulness of MMC. There are very studies discussing the fact that it (and all chemos) are carcinogenic as well. The study you quote makes a lot of sense, saying that the risks have to balance with the benefit. That same logic holds true for any medical treatment out there.
Have you read the info on webcafe about Mitomycin? It starts on this page, and links to a separate page about Mitomycin's new protocols:
blcwebcafe.org/intravesicalchemo.asp
What was your original dx?
All the best,
Wendy