Has anyone found any guidance on developing for Office 365/SharePoint Online based on the SharePoint 2013 product line? We have been tasked with upgrading a webpart that was developed for SP on premise, and migrating it to Office 365/SharePoint Online. The solution was implemented via the SP API, on premise SharePoint 2010. I know we're looking at implementing it as a sandboxed solution, and that was the case when Office 365 was SP2010 based, but, what's different now that people are being upgraded to SP2013 based SharePoint? Thanks!