Sending form data directly to a web service

[eluser]eokorie[/eluser]
Hi all,

Is it possible to send form data directly to a web service? I am currently designing a from that will allow a customer to enter his/her name, a reference number and telephone number as well as the ability to select whether they want to receive an immediate callback or a callback at a later time.

Thing I want to know is whether this information can be sent directly to a web service or does it have to be formatted in a certain way before that is possible? Current starting to dabble with web services so be gentle.

Thanks