Hi,
You are right there is no specific 2007 Developer Certification for Access. The only certification available would be MOS (Office 2003) or MCAS (Office 2007)
Exam 77-605: MCAS: Using Microsoft Office Access 2007
http://www.microsoft.com/learning/en/us/exam.aspx?ID=77-605
Exam access2003: Microsoft Office Specialist: Access 2003
http://www.microsoft.com/learning/en/us/exam.aspx?ID=access2003&locale=en-us
I would recommend you to go for Microsoft SQL Server 2005 or 2008 exam.
TS: Microsoft SQL Server 2008, Database Development
http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-433&locale=en-us
TS: Microsoft SQL Server 2005 - Implementation and Maintenance
http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-431&locale=en-us
Good luck and hope this is helpful.
Rubel Khan -
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