in reply to A question of style
I tend to use parens and & on my functions. I think it makes it easier on whoever has to read my code next. The parens remove any perceived ambiguity(sp?) about function params and the & clearly seperates which functions I've written from any built in ones.
IIRC there was some difference about using the & in Perl 4, something to do with the order in which perl tried to find the code for it, or something. (perhaps merlyn will clear this part up).