By 1st of February 2014 Magento stores selling in the EU have to adjust their debit payment method acoording to SEPA (Single Euro Payments Area).
There are a few resources telling you what to consider (for German-speaking folks: SEPA and the adjustment for online shops, SEPA - changes in Magento) and an example on how it may be solved in a general store (German again: Demo-Shop PAYONE) but I'm looking for actual experience with implementing these changes. Do you have tips for / did you have problems with existing extensions or custom solutions?