Bitgen 0.16 has been released:

http://bitgen.org/

This release includes support for mnemonics to extended addresses for HD wallets (BIP 32).
Random mnemonics are created by bitgen, and the corresponding xprv/xpub addresses are calculated and displayed.

Here is an example of a mnemonic generated by bitgen:

Private part:
http://bitgen.org/mnemonic_sample_private.pdf

Public part:
http://bitgen.org/mnemonic_sample_share.pdf

The supported randomness functions are "random", "dice", "hash" and "hex".
Also an existing mnemonic can be specified.

To generate a 24 word random mnemonic the following command is used:

$ bitgen genMnemonic random

It is possible to create mnemonics with fewer than 24 words. The values 12, 15, 18, 21 and 24 are supported.
If so, the number of words should be specified directly after the "genMnemonic" command, for example:

$ bitgen genMnemonic 15 random

However, 24 word mnemonics are recommended since fewer words reduces the strength of the random data.

If "dice", "hash" or "hex" generation is used the corresponding random data should be given.
For example, the following command will generate a mnemonic from hash data:

$ bitgen genMnemonic hash hJhKHUiisdfiosduoiuueuUUIDUoiudfiosnNMMMDDFSSDFiuUDFIDSFUoiFUiodfOIUoiuqoiuqoiu auiodsodifusdofiuIUIOUOIUDSFoiusdfiouIUFDSfs7dfsd8f7sdfkjsdfsdjfhj3242h34kjsadf kjhsdkjHJKJKJFskjdhfskjdhhsdfhghqhqhqiaibbxvvzzaajassiusadasiduasidfusujhYYUYhJ jsi

If an existing mnemonic is used, the "mnemonic" generation type can be used to calculate the corresponding xprv/xpub addresses.
For example:

$ bitgen genMnemonic mnemonic "tortoise wool skate ribbon tragic noise disorder napkin gossip slice improve vapor"

In the ps/pdf files the lower right QR code is the mnemonic.
The lower left QR code is the corresponding xprv address.
The top left QR code is the xpub corresponding to the xprv.
The top right QR code is the derived address for the derivation path "m/44H/0H/0H".

The derivation path "m/44H/0H/0H" can for example be used with electrum to create a watching only wallet for the addresses corresponding to the mnemonic.

The txt files that are created includes the same information in text form.