Stik is correct, you don't need a valid licence to compete as you can have a safety pilot with you. However you will be competing H/C and while you will be given your marks from the judges, you won't be given a place in the final results. Don't know of anyone who is H/C at any level higher than std.
A B, you didn't say which aircraft you are going to use after you finish training at UH.
ZA
ps, the dates in your blog for the competition are 2008 ones (not 2009 ). The 2009 will have less events than 2008 as the World Unlimited Aerobatics Championship is in the UK at Silverstone in Aug 2009. Thus the calendar will be emptied of any national events for about 4 weeks. Helpers will be welcome.