We are celebrating my great grandmother's 100th birthday in a couple of weeks and I have the privilege of making her cake but I need some ideas on a great cake that will make people say wow and it need to feed at least 100 people. I have about 4 pictures of her that I would like to incorporate into the cake as edible images. Any ideas would be greatly appreciated!!!

How about a cake with multiple photos. I don't know how to do it but have seen them before and they seem to be perfect to reflect her 100 yrs..memories of past & present...
Here is a sample I saw on the internet....
http://4.bp.blogspot.com/_CXxZUo2Y2QI/Szq_Nk4pAGI/AAAAAAAADo8/jLio846eq7s/s1600/Black+and+white+edible+photo+5tier+wedding+cake.jpg

wow thats nice...thanks for the idea!!!