Met with the kind folk at Trike.com.au who are writing R2.0 today.
A pre-release beta version should be available this time next week to play with and poke. It will be rough, but will have key functionality implemented.
Have come back from OS to find work on Radiopaedia 2.0 well underway. Should have some bare-bones beta-testing for anyone interested in a couple of weeks. At this stage 'go-live' is scheduled for around end of March, but you know how these things are.
All the content will of course be ported over, so continue to submit!