I work at Sun Microsystems.
The opinions expressed here are my own,
and neither Sun nor any other party necessarily
agrees with them.
It's nice to be a native speaker of a living language; if you keep your eyes open you can watch usages get born, flourish, and die; or sometimes find a permanent foothold in the population.
Old usages come back too. Lately, I've noticed a lot of people writing Bah! in emails and postings and chats and instant messgages. It's a good, strong, punchy, aggressive word and (here's a fearless prediction) is going to live long and prosper.