As another poster mentioned, SOAP::Lite does a lot of the same things, though it's more specific to methods rather than all Perl datatypes. Even so, I've personally never felt the need for anything more (though I could stand to have something less).

On another subject, I'd like to point something out to you. PM tends to not get bogged down in useless debates over grammer and spelling, and I tend to avoid them even in other forums (because it should be obvious to everyone that my own spelling is far from perfect). However, I've seen you use 'soo' in many nodes, and it's been bugging me. There is only one 'o' in 'so'.

Also, you seem to use 'so' as a "crutch word", i.e. a word which tends to be overused by a writer when they can't think of something better to get down. Most (perhaps all) writers pick up a crutch word from time to time (I think I use words like 'although', 'though', and 'just' as crutches), so don't feel like you're singled out here.