http://www.mybollox.com/  Allan has posted here
http://www.checkemlads.com/ has posted here
http://www.dontbeaschmuck.org/ Teen Testicular Cancer - son had it - Has a
web forum

http://hcd2.bupa.co.uk/fact_sheets/Mosby_factsheets/testicular_cancer.html

http://www.royalmarsden.nhs.uk/patientinfo/booklets/testicular_cancer/testicular3.asp

http://www.cancerbacup.org.uk/Cancertype/Testes

http://www.bccancer.bc.ca/PPI/TypesofCancer/Testes/default.htm

http://www.cancer.org/docroot/CRI/CRI_2_3x.asp?dt=41
http://tcrc.acor.org/staging.html
http://menstuff.org/issues/byissue/testicles.html

http://bmj.bmjjournals.com/cgi/content/full/322/7302/1583 Managing
testicular cancer

There's also alt.support.cancer.testicular but it's mostly overrun with
garbage posts.
And two ACOR email lists http://www.acor.org/mailing.html?l=t