Chees_man, you are correct. My last truck had overhead cams and hydraulic lifters though, so I'm a little lazy in my wording.
In this case the proper term is "Direct Acting Mechanical Bucket (DAMB)". These are supposed to last at least 150000miles and first appeared in 2001. I figure by now the truth about how long they really last may be apparent. These buckets come in thickness ranging between 3mm - 3.75mm. My motorcycle's overhead cam design requires routine shim adjustment but at least it is not hard to work on. It bothers me a little that there is no hydraulic automatic adjustment here. My last truck (V6) went 360000km and ran fine when I sold it.
SVT passes torch to DURATEC 2.3 - Page 9 - Focus Fanatics
"Bucket-and-shim valve actuation eliminates the need to move the mass of a rocker arm, and therefore allows relatively higher RPM running
Decribes the design and mentions the 150000mile target life.