On my Treo I could look up a contact and select send using text and it would ask which number. It would then place the person's name and the number I selected into a text to be addressed. My Pre Plus only lets me text or email the entire vcard, which I don't want to do. The recipient seldom wants any more than the mobile number and certainly does not want all the information in my notes.
I have seen forums.precentral.net/future-palm-devices/256945-webos-desktop-coming-2-0-a.html "Is there an easy way to send contact information via text" and their solution is one that I have used, but involves editing the contact and then cutting and pasting the number that I want to send. This is a kludge.