I have been looking for security features too and haven't had a lot of luck.
With the Spyder you have a security chip in the key that should deter / prevent hot wiring. The Spyder also has a lot of metal and tupperware around the ignition switch. Given what appears to be an open, tubular frame, I was wondering if it has any anti-theft features like the Spyder?
I suppose an after-market system could be installed, but again, I wonder about the open concept hindering your ability to protect (prevent from tampering or defeating) your security system.