Welcolm to the forum Purple. We look forward to reading your thoughts.
As Samboo said, to submit a sig for Justin's card, we are asking that members have postive reputation and at least 10 posts. There are tons of interesting topics around here that you can contriubute to so I'm sure that you'll be able to meet the requirements before the deadline.
One more thing--I don't see your sig. I see your forum sig, but for the card we are asking that you actually upload your greeting either by scanner, digital camera or a image program like "Paint." We want Justin's card to be "personalized" with members' handwriting, rather than computer generated if at all possible. You can see some examples of people's sigs on the sig page a few posts up.