Features are available in i18n-1.2

To elaborate on what Jax says, in Internationalization are, under "Multilanguage options" (specifically "Options for node language") when editing the node type:

• Set current language as default for new content.
• Require language (Do not allow Language Neutral).

They're both checkbox settings, so if you check both, they have the effect of first selecting the current language for new content and removing the "Language neutral option".

The one feature it adds over Internationalization is the ability for the administrator to choose what language gets set as the default option when creating a new node. For example, if the content editor is browsing the site in English, and there's a node type that will only be German, you can make it so that new nodes get saved as German unless the editor makes a change to the language selection drop-down.

See #669912: i18n: Extended default node language selection for a patch to get features from Language Select into Internationalization.

@Richard: could you review the patch you mentioned? I made that patch and would like it if it gets into i18n. Once it gets into i18n I can set this Language Select as deprecated.