PGP key replacement time

I have a new pgp key.

Feel free to sign it at your pgp.net keyserver of choice.

$ gpg –fingerprint FE264BAA

pub 16384R/FE264BAA 2008-01-17 Key fingerprint = 9A05 99DB 838D 9049 0509 AD5D 26A4 2F8A FE26 4BAAsub 16384R/3CA219BB 2008-01-17

Why so big a keysize? A friend of mine cited the following:

NIST key management guidelines further suggest that 15360-bit RSA [...]