31 bit ptp link addressing?

Hi all, Just (mostly) out of personal curiousity - is anyone here running any PtP links using 31 bit prefixes rather than the /30's we're all happy with? If you go "huh?" take a look at rfc3021 - "Using 31-Bit Prefixes on IPv4 Point-to-Point Links" Thanks, Adrian -- Adrian Chadd "For a sucessful technology, reality must <adrian@creative.net.au> take precedence over public relations, for nature cannot be fooled" - Feynmann