Use this form to create a new account.
If you have contributed in some way to free software (i.e. if you feel you can get certified to at least Apprentice level), the answer is yes. If you just use free software, then an account won't really help you that much.
Right now, the main thing an account buys you is the ability to certify and be certified. Soon, being certified will grant you privileges to post to the news flow. It's also plausible that down the line, being certified will bring other benefits.
And in the meantime, it's fun! So if you are a free software developer, go ahead and sign up: