I concur on "Network Programming in Perl" -- it is a right nifty addition to the library, as is the 'Perl DBI'. You might want to hold out a few months before picking up 'Programming the Perl DBI', I seem to recall a CB conversation that the second edition of the Perl DBI is in the works. They are aiming for this Summer (by PerlCon in July).

Take a look at "Open Source Web Developement With LAMP", James Lee and Brent Ware. It's a good introduction to the Art of the Web-Developer, covering a variety of technologies and languages, not just Perl.

On the Non-Perl side (a well rounded Geek reads omniverously), Eric Raymond has a neat book just out on the history and philosophy of Unix -- "The Art of Unix Programming". And Andrew Hunt and David Thomas "The Pragmatic Programmer" has a lot to recommend it. (In the 'Why didn't I think of that!!' vein.) I have put both of them on my Must Re-read In Six Months list.