One of the classics on Paul is now available in full online:
W. Wrede, Paul (translated by E. W. Lummis; London: Philip Green, 1907)
I have added a link to the Paul: Books and Articles page. On the same page, I have also corrected the URL for the following:
Dale B. Martin, “Arsenokoites and Malakos: Meanings and Consequences”, in Brawley, Robert L (ed.), Biblical Ethics & Homosexuality: Listening to Scripture (Louisville: Westminster John Knox Press, 1996), 117-36.
Update (Friday, 10.41): With thanks to several commenters, it seems that the book is not available in toto everywhere, e.g. it is not available in the UK. It is not yet on archive.org, though the German original, Paulus, is. If anyone fancies uploading the PDF to archive.org, that would be great. Please let me know if you do.