What would be the advantage in using VRF-Lite at the CE (e.g. a 3750 switch) and trunking a series of /30 pt-pt VLANs (one for each VRF) from the PE to the CE switch, and then defining customer VLANs on the 3750 versus defining the customer VLANs on the PE device and simply trunking the customer VLANs down to the 3750 switch. In the latter scenario, the IP Services feature set would not be required on the 3750 as VRF-Lite would not be necessary at the edge; just VLAN separation, with IP routing disabled.
A couple of possible benefits for using routed /30 links to the CE:
(i) if the routing is complex at the CE site and more subnets need to be advertised towards the PE (i.e. it's more than a single VLAN);
(ii) SP does not need to get involved in customer routing, but in a small Enterprise MPLS scenario, the customer and the provider may be one and the same, so may be less of an issue;
(iii) A dual-homed CE device may need routes advertised towards two separate PEs.