He has a point.
If summon missile is only spell you know you should be able to write "/cast s" and the system understands it.
Basically, you have to write only first letters of each spell name and if this will be unique, eg you will know no other spell starting with these letters, the system should know, which spell you want to cast.
And yeah, shortcuts is a good way... but you know, we don't have infinite sortcuts and even if we have really a lot now, i find not enough key-shortcuts for these ;P
And Caarie, how are you doing that? I had the shortcutedit window fixed since over half a year and was talking with various people about implementing it and your stuff goes instantly in. + mine is resizable and has an actual BG image
