Still not sure how long quicksilver will remain viable so whenever a new product comes along that might have a chance of replacing it, I go ahead and try it out. QSB however, like all similar apps, fails to even come close to the quicksilver potential.
QSB does what most app-launchers do and adds a quick link to searching the net, wow, not impressed. Unless it's obscured but possible, QSB doesn't have context-aware triggering (start your search with whatever is highlighted), which I use a lot for opening a folder from a finder dialog into the terminal, or to dig deeper into such a folder's sub-tree. Also to open a document with something other than the default app, which QSB can't do even if you find the document from it's search-box.
Any custom triggers? Since QuickSilver has such comprehensive trigger-support I don't have to install numerous apps to, lock my screen when I walk away, control itunes through key-combo's and various other common tasks.
I was really psyched about QSB when I heard of it, google tends to come up with realy useful software, but this time it's useless, it doesn't do anything that doesn't come with OSX's own software...