For folks just getting involved, there is associate membership, which costs just $25/year and gets you discounts to events. It's easy to join as an associate member: complete the online application, or download, print, and fill in the paper form. After you've completed either version of the application, please send a note and a check/MO to the Treasurer[1] or use PayPal to send in your first year's dues.
If you want to have a voice and a vote in shaping the future of FSA, and you've been an associate member for at least a year and a day, you may wish to apply for a voting membership, which costs $45/year. If you want to become a voting member, please download, print and submit the voting membership application. You'll need to sign it in the two places indicated and get 2 voting members in good standing to sign it as your sponsors.
Voting members may also become lifetime members. Lifetime memberships cost $500, and lifetime members have all the rights of voting members, plus an invitation to a special reception at each year's FSG, with no further dues payments required.