If you have the agenda in PDF format three are several annotation apps that may do what you want. GoodReader, iAnnotate, and PDF Expert are all good. They all have slightly different features and strengths, so read up on them first.
I've been looking for one to meet my needs, want custom templates, photo import and annotations with export to dropbox.
So far the best I have found is Noteshelf.
Just need a stylus now, but the finger works ok.