OK, it's getting kind of scary when my museum research gets into rhythm with me... check out this online exhibition from Sydney's Powerhouse Museum: The rags: paraphernalia of menstruation.
I particularly love this quote from Liz Giuffre in the 'Heckler' column of The Sydney Morning Herald (23 August 2004):
Despite the GST [Goods and Services Tax] classification of pads and tampons as 'luxury items', let me, on behalf of the women of Australia, let the manufacturers know that they have a captive audience. There is absolutely no need for this continued marketing push to make the products 'fun' and 'funky'.
24/08/2012 - edited to add: I have made an 'Adventures In Menstruating' board on Pinterest, prompted by finding a bunch of (now amusing) Tampax ads in some 1960s knitting magazines I found in a charity shop.