So, I am not quite sure if some of you had this problem, but it seems that SEFAZ SP already deactivated the webservice for status check (consulta de status) for layout 2.00. This means, that even the NF-es issued with layout 2.00 have to be checked in the new webservice.
For that, we have created a new Note to deal with that. Please pay attention that this changes will be for all regions (CUFs). This happened for CT-e as well. So, after implementing the following Note all requests will be send to through the namespace 008 to the new webservice.
Also, please note that the Support Package 20 that should be released in the middle of April will already have this correction.