PDF-file with questions and answers from Bada Developer Day India, held in September this year, appeared in Internet. So, from this answers follows that Samsung is working on a package of business applications for bada (like BlackBerry), they have no plans to create a two SIM-cards smartphone yet, but everything is possible in the future. The tablets under the bada not expected, 'cause the system is designed for smartphones. More questions and answers can be found here.
By the way, developers can find useful information on certification and developing applications for Samsung bada.