I recently saw the mail (yesterday) to some of the partners and customers about upgrading to SMP 3.0. It is a preemptive type of reminder when Agentry 6.0.X will be on end of mainstream maintenance and move to customer specific maintenance (please review SAP note: 52505 on definition). This is somewhat good news for people upgrading as it gives you more breather room. The date seem to be extended to July 31st 2015. Internally we know of May 2015 as the hard date. I am not sure if this is only on specific strategic customers or all customers as the list of this mail is for specific Syclo based customers (the To: in the mail is for X amount of named customers). Please review your company mail (or letter from SAP) to get the official extension date. For now after reading this mail, I am changing my statement above of May 2015 to this July 31st 2015.
Note: The Agentry 6.0.X or Agentry 6.1.X technology is built-in SMP 3.0. From a stand-alone server it is now a library being sourced in SMP 3.0. There are differences of administration type of activities for people who are used to the old administration quirks or features of the stand-alone. We have some online docs available in SCN on specifying the differences or what to expect (Search using your favorite browser online "Agentry 6.0 SMP 3.0").
As my official guide on which one to use: Go for all the mobile products we released in SMP 3.0 (Like: Work Manager 6.1/6.2). Try not to start on projects this year that has Agentry 6.0.X or Agentry 6.1.X (ex: Work Manager 6.0). You want to be in Agentry 7.X (which is built-in SMP 3.0 - this will help you avoid any escalation why certain features are not available if you are using older versions). Each product delivery is different. Like Work Manager 6.1 will be different than Sales Manager 2.5.7. Read each installation document properly as they differ.
In summary: go for SMP 3.0 now. Make it part of your plan and scheduling. All our training is pushing SMP 3.0 to all Agentry 6.1 or Agentry 6.0.X customers.
Best Regards,
Mark Pe
SAP Senior Support Engineer