o-:  Another term of respect, used at the beginning of nouns.  Can be used
with -san or -sama.
[You can therefore refer to me as o-StarFurie-sama.  NOT!]

I've never seen this that I can remember.  I usually see o- attached to 
inanimate objects or verbs.

According to my dictionary, the o- prefix has two meanings:

1) An indication that the noun in question belongs to someone other 
than the speaker.

For example: okonomiyaki 

             o-           your
              konomi      preference
                    yaki  grilled, cooked.

2) Shows politeness

for example: otousan  (father)

3) It also indicates that the o- prefix has become permanently 
attached to some words.

for example: ocha (tea)
 

-sempai:  Upperclassmen.  Also used in work for senior employees of same rank
or bosses.

To be really picky, this suffix is actually -senpai, but due to the 
rather odd pronounciation rules of the Japanese letter 'n', it is 
pronounced as an 'm' in this case.
 
 

- Sean Connor (connor@meena.cc.uregina.ca)

        "It jams." - Intel TV ad, referring to the Pentium chip.