The new TRIP enhancements rolled out last week and Jon Brassey lists off the major improvements here.
The specialist search engines look interesting:
26 specialist search engines. 26 today and more in the near future. These specialist search engines allow users to simultaneously search the core TRIP content plus the top 10-15 journals specific to that area. I see it as a bridge between users having to go from TRIP to the full, difficult to use Medline.