The Lib Dem conference agenda for Autumn 2011 includes policy motions on Science Not Stigma: Ending the Blood Ban (p39), Protecting Individuals and Communities from Drug Harms (p24), and Tackling Violence against Women (p30). Full texts of these motions and others, are found in the agenda (pdf).
If you're going, and you have an electronic diary, then you may find this iCalendar file useful: LDconf-09-2011.ics The information here is taken from the very nice new pocket diary, but please let me know in the comments below if you see any errors.
You won't see Labour or the Tories debating these issues. Neither party makes policy at conference. Labour don't even publish their conference agenda!
Edited to add: I've also posted copies of the conference agenda and the conference directory, to which I've added electronic Tables of Contents. Note that they'll only be available here for 30 days. The Tables of Contents make it much easier to use the electronic versions of the papers. Don't forget to also consult the "Conference Extra" papers, with late amendments and editions, available from http://www.libdems.org.uk/autumn_conference_papers.aspx You'll also find full policy documents and consultation papers there.