Its now possible for someone to use the 'locate me' control when adding their business; a small but important improvement for mobile users.
iandees has also been kind enough to clean up a few existing pull requests around internationalization - onosm.org now supports English, Portguese(Brazillian), and Italian. If you'd like to localize it, its really easy - just fork the github repository and create a new file in the locales directory.
There are a few other experiments for it pending, such as 'sync my business details from a facebook page I own', or 'upload details of 5+ locations from a CSV'.
Ultimately, I'd be keen to provide an experience similar to a 'manage my google listings' scenario - both google and facebook have seen a lot of uptake from business owners. While business owners dont have quite the same incentive with OSM, I am really keen to make it as easy as possible if they choose to publish to OSM.
There are a few other ideas in the works, like "Invite a business owner to share/update their details", or "check how my OSM listing appears on open data sites - maps.me, mapillary/openstreetcam, missing attributes, etc"
What do you see as the ultimate, simplest entry point to getting a business onto OSM with accurate, useful details?