I have been using an Android phone - the Nexus One running Gingerbread for 2 weeks and it could be the ultimate bedside capture tool.
I have set it up with one button press to launch Google's Voice Commands. This allows me to say something like "Note to self, buy more milk at store", and the phone emails the voice recording to me with a transcription (not too accurate but still useful) to my inbox.
I am looking into setting a rule in Mac Mail to automatically send it to Omnifocus.
So far I am very impressed at how quick and easy this technique is.