The fourth beta of iOS 7.1 blocked the kernel exploit used by the evasi0n jailbreak. The just released fifth beta of iOS 7.1 takes things a step further and pathes the AFC sandbox escape as well.
evasi0n7's afc sandbox escape is patched in 7.1b5 too.
afc refuses to bind to a specific port now (when running as mobile).
It's unclear if the evad3rs have any unreleased exploits that could work for iOS 7.1 but of course that information won't be released until after iOS 7.1 is officially available to the public.
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