sendmail trojan

["jnf " <profane () friction net>]

hi, ive got a question, it seems several oss programs of late have been trojaned at the provider level- which leads me 
to wonder if this is a message 'read your source', which made me wonder, are these trojans obvious? as in if you just 
scanned over the source would you see them?
if anyone has a copy of some of the source that is trojaned, or knows where i could find some, it would be appreciated. 
thnx

j