Don't be afraid to participate, if you see a paper you find interesting download it, read it, and comment on it.
So long as you have a created an account you will be able to do this with out problems.
Most of all don't be shy, if you disagree with something, disagree it helps stimulate discussion, just don't be rude.
Have fun and we hope you learn something over the next 2 weeks.

For the next IPROMS Conf. I propose the book of proceedings to be distributed a few weeks before Conf.