Prism
Explorer
http://www.enworld.org/forum/general-rpg-discussion/264546-ph3-preview-skill-powers.html
The majority of them are very situational and shouldn't be taken by anybody. Fine if they cost nothing, but they in fact cost powers so weaken the character. Nice job putting pitfalls in the character creation guys. *golf clap*
Our current party can handle most encounters with little problem as it stands - and they are not optimized in the slightest. I'd say there is plenty of scope in 4e to take a few non combat utility powers without causing any problem in combat at all. In most cases doing well in combat comes boils down to good tactical playing more often than best choice powers. Personally I think the skill powers are great and often more interesting than a classes own