OK, but this may be a looong post :)

1. bless 'registers' a reference as being of a certain type (or class). The type to use is passed as the optional second parameter. If the second parameter is omitted, it defaults to the name of the current package. bless is most often (always?) used in the constructor of an object, so that the object carries with it its type. If you create a subclass which inherits the constructor of another class, then unless you use the two parameter version of bless, the object will be blessed with the type of the superclass, not your class.
2. AUTOLOAD is a special function which (if it exists) is called when an unknown method is called on an object. It's very powerful and you can use it to do all sorts of deep magic!
3. Named parameters are a very neat trick to learn. Basically you treat @_ as a hash.
4. qq() is an operator rather than a function. Find info about it in perldoc perlop.
5. All CGI.pm HTML functions take an optional ref to a hash containing attributes as their first parameter.

Let me know if I can be any more help.

--
<http://www.dave.org.uk>

European Perl Conference - Sept 22/24 2000, ICA, London
<http://www.yapc.org/Europe/>