I would like to donate some code to the project, formatting numbers as any base from 2 to 64. The FAQ describes contributions to the core code, but it's possible contrib is a better target. This is all of course contingent on how well received this extension code is of course. Code available at the following link.
I believe it follows the PostgreSQL project's C code formatting guidelines and includes tests. Preliminary checks show it to be about as efficient as the built in hex formatting only it supports the full gamut of number formatting: binary, ternary, octal, hex, base 36 (popular with Javascript), etc. I was scratching a personal itch, but hopefully this can scratch others' as well.
Cheers,
Miles Elam
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Quidquid latine dictum sit, altum sonatur. - Whatever is said in Latin sounds profound.