upgrade crm 4 to crm 5 or 2007: when SAP will stop support crm 4 and crm 5
As you see I continue to look for help in decision:-)
when will SAP stop supporting CRM4 and when CRM5?
CRM 5.0 have a Mainstream-Maintainence till 31.03.2011.
Pls check https://websmp109.sap-ag.de/pam too.