Sorry to blow my own horn, but if you want to control the "shape" of the passwords that are generated, you might try my randpass script (version 1.02, just uploaded, or older version 1.01). Examples:

% randpass
SujTvRwgJP

% randpass --phrase 2 --join '/' --count 3
sure/sperate
truff/nimbed
locale/vitamin

% randpass --phrase 5 --source english/k
kampong kuletuk kharif kimmer kickup

% randpass --chars :HEX --word-length 16
C10B0A9BEC754BF5

% randpass --chars 01 --word-length 8 --count 4
00001000
00100101
10011110
11100000
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