Some folks are already doing this but I wish more people would stop providing just a .pdf file for a race advertisement.

For some reasons from a smarter guy than me:
http://www.useit.com/alertbox/20030714.html

Additionally, one cannot read anything from a pdf file until the whole thing downloads. This is a concern for those of us stuck with low bandwidth or noisy connections.

My suggestion is that people would provide the option for users to view a text only or less download intensive version than only having pdf files available.