need a sed guru to help me strip out words

[Eric Wood]

# fuser -u SO*
SODEI:  8952(whse) 23496(lhoover) 28450(recept) 28845(dschuetterle)
30835(awalter)
SOLSI:  8952(whse) 23496(lhoover) 28450(recept) 28845(dschuetterle)
30835(awalter) 20242(ewood)

I need a sed formula to just list out the user names

# fuser -u SO* | sed 'something' | uniq
whse
lhoover
recept
dschuetterle
awalter
ewood

Any help is appreciated!
-eric wood