Is there a web resource available to browse LEGO Minifig head designs?
You can find all the minifigs heads ever made, with the date of release, in the BrickLink catalog: http://www.bricklink.com/catalogList.asp?pg=1&amp;catString=238&amp;catType=P&amp;v=2

Please note that I have already sorted the minifigs heads in the link above by year released, however on the first two pages of the results you will see heads where the year is not applied yet. These are new minifigs heads and the sorting and cataloguing haven't bee finished yet. You will start to see the yearly results on page 3.