No, not at the moment. We will support them in v4. SQL Server 2012 was released too late for us to add the support to v3.5 as it requires additional code in the DQE to obtain the last sequence value.
If you need them, there's a way to add them to v3.5, by altering the SQL Server driver sourcecode to obtain the catalog sequences (check with the Oracle driver how it's done) and additionally, a piece of code has to be added to the Insert query producer in the SQL Server DQE, so it will obtain the proper sequence value for an inserted entity. For oracle, postgresql and DB2 we execute the sequence retrieval scalar query first, then use the value for the insert query. This is a 2 roundtrip query, as older versions of the ADO.NET providers of these databases didn't support batch queries. The scalar query to obtain the sequence version can easily be scheduled within the insert query so it's not a lot of work.
