How can I get enough reputation to be able to actually post an answer here?! It seems that I need 10 reputation to answer the one question that I really want to. I have some awesome answers to the tweetable mathematical art, but I don't know enough about Code Golfing to answer any other questions.
If you can code well enough to do tweetable mathematical art, you can participate in the king of the hill challenges. These get voted on heavily so you can get reputation on this site faster then on others. That being said if you have nothing to contribute, please don't upset the other challenges with posts that don't contribute.
If you have another stackexchange account with a decent amount of rep, letting the software garnishes you 100 rep on each site. This rep, however, cannot be used to overcome that 10 rep wall according to commentors below.
10 rep is 2 votes on a question or just 1 upvote on an answer. This very low ceiling is to prevent people spamming very low quality posts. Prove you have something to contribute anywhere else on this site and you will get that rep quickly.
If you want to answer another question in order to gain the single upvote required to allow you to post to the protected question, I recommend clicking on the tags link at the top of the questions page and choosing a tag that interests you. Not all questions on the site require golfing skills.