Like it a lot. And the subsequent ideas that have appeared. A few minor thoughts in no particular order, to take or leave as you wish:
1) Make the title a bit more eye-catching. In capitals, bigger and bolder, and include the word charity, so that if it's on page 3 people scanning it don't just turn over the page thinking that it's about donations to CA. Perhaps something like "Help Support CA's Chosen Charities".
2) If this is to be updated each year, and particularly as the nominated charities may change from year to year, might be worth something along the lines of "Produced in aid of charity, the 2007 Club Arnage Guide to the 24 Hours of Le Mans is free to download. Those who gave their time and skills to produce it and help you enjoy the Le Mans experience would be very grateful and would really feel rewarded if you could make a donation, of however much you feel able to spare, to help us support three very worthwhile charities". Put the words "to help you enjoy the Le Mans experience" in bold font.
3) Not sure of the IT trickery involved with pdf documents, but can the website links be included as links that can be clicked on, which would make it easier for someone to visit the sites when viewing electronically?
4) For the bank transfer details, separate the domestic UK coding from the international coding.
5) Reference to the distribution of the funds is rightly included - probably worth also stating that details of those funds raised and their presentation to the charities will be posted on the CA forum.
All the best,
MG Mark