There is already a mobile (lightweight) version for smartphones. You should see it automatically when using you're phone. I used it for a while earlier today on my iPad on a 3G connection and it works fairly well. If you're not seeing it, please let me know what phone you're using.
i miss old layout, and if you can, please make some lightweight version of it - if not for "less fortunate" users like me (still on firefox 4), then for smartphones