Sure. Basicly hotkey for reading the last notice(chat) you received should be somewhere near enter. Like Insert for example. Im not sure about laptop layouts though.
Since the following ideas likely need the letter P, Id suggest ctrl + P or the "pause key" for pausing the game. And generally ctrl + letter for more general things, like turning of the music ctrl + M, turning of the sound ctrl + S etc.
+hotkeys for building each structure in either
a) Logic based on the structure name. Like sawmill = S, Inn = I etc.
b) Or logic based on the position of the button in the GUI (Id prefer that, its much more comfortable actually).
Like School = Q
Inn = W
Quarry = E
Lumberjack = R
Sawmill = T
And second line below that. As we run out of lines, continue from Y, U, I, O
This sounds pretty bizarre but is actually quite logical, at least the first part, where first row of keys start in QWERT.
+hotkeys for training units in school, barracks and town center
a) With unit name logic. Like S = Serf, L = laborer
b) With numbers and keys, so that after 8,9,0 it starts again at Q, W, E, R etc. So that lets say
serf = 1
laborer = 2
stonemason = 3
....
butchers = 9
Miner = 0
Metallurgist = Q
Blacksmith = W
Recruit = E
This way one can add in like 30-40 units with no risk of running out of hotkeys.
Honestly I think KaM single player is great as it is, but I missed the hotkeys most in multiplayer, because theres much more going on all the time, if you harass with 4 units in different places + try to build a base + make more units to harass. So the slow game becomes actually very fast, once you start playing more actively. And thats when you want hotkeys for everything.
For inspiration, this is some dude playing Warcraft III. The cameraman is filming his left hand which is dancing on the keyboard because the game has nice hotkeys. Of course I dont expect anyone to go that crazy
http://www.youtube.com/watch?v=54ApAspotwY&feature=related