Looks like BitDefender has upgraded their free edition to the new 2009 engine. The webpage has not been updated, but downloads are active.

32-Bit:
http://download.bitdefender.com/windows/desktop/free/final/en/bitdefender_free_2009_32b.exe

64-Bit:
http://download.bitdefender.com/windows/desktop/free/final/en/x64/bitdefender_free_2009_64b.exe

Like the previous free edition, BD 200 free edition provides only on-demand scanning and an automatic updater. You have to register after install for 1yr license, after 1 yr you can re-apply for another 365 days use (kinda like Avast!).