[LordOphidian]

The Go To... field is very usefull in some apps, but completely useless in others. It helps, for example, if you want to open or save files to locations that are hidden (/usr, /var, etc), but those cases are rather rare for most users.

As for services, they are quite usefull, in Cocoa apps that is. OmniDictionary's Define is great. Just select a word in OmniWeb or some other app and hit Cmd-= and it pops up with the definition. Quite nice. Carbon Services are still broken in many apps, but some do support it, and the api is supposidly getting better with each release of Carbon.