How to save bitcoins as paper? I would like to save some of my bitcoins on a piece of paper with QR code printed on it. What would be the easiest way to do it without using Mt Gox. or similar. Just bitcoins (I'm not afraid of some programming if it's needed).
Currently the most popular method is to use something like pywallet to export your public/private keys and simply generate a text QR code for them. Typically separate QR codes are generated for the public key and private key so that one code may be used to receive payment without giving away the private key which allows spending from the account. There are some alternatives, however, depending on your paper wallet needs.

Casascius' Bitcoin Address Tool is an excellent way of saving bitcoins in an easy to recover format. Though it doesn't yet support QR codes it does have the ability to generate a paper wallet from any passphrase. Once generated you could store the public and private keys as QR codes using any of a number of applications or online generators. Additionally, you could store the passphrase in a QR code and use it to recover your addresses at any time.

I specifically suggest this as opposed to simply exporting keys with pywallet and QR-ing them because this method would let you store more than one wallet address using a single QR code since any passphrase can generate up to 999 addresses deterministically in such a manner. Of course having a simple public key in QR code form also lets you scan the address with a smartphone or computer to send coins, so ultimately the solution depends on your usage.