Typical mouse proficiency:  accuracy to 1/100 of the screen along each axis, 2 clicks per second

 lg(100*100)*2 =  26.5 bits/sec

Typical keyboard proficiency: 60wpm, 5 keypresses/sec out of ~40 possibilities near the home row.

lg(40)*5 =  26.6 bits/sec

keyboard (one-handed): ~3 keypresses/sec

lg(40)*3 = 16 bits/sec

combined mouse & keyboard:  42.6 bits/sec

Cell phone keypad:  12ish buttons, 5 keypresses/sec

 lg(12)*5 = 17 bits/sec