I just remembered an old issue of 'The Perl Journal' I had contained an article on writing wireless applications with perl. The issue was #20 ( Vol. 5. No. 4 page 28-39 ).
The article explains ( quite well ) how to configure an apache web server to handle wireless markup language ( WML ) pages on a WAP enabled cellular phone. I'm relatively sure a PDA wouldn't be
You can read the entire aticle at:
http://www.sysadminmag.com/tpj/issues/vol5_4/