Phone Home!

My thoughts on phoning home in software.
Disclaimer: My software, when appropriate, phones home.
My life, and the life of my customers were both significantly improved by adding a tiny feature to my software licensing scheme. My software phones home. BUT, a big hairy but, ONLY WHEN THE USER REQUESTS it.
PROBLEM I have discovered that a percentage of users have difficulty copying a license file to a given directory. I have discovered that a percentage of users have trouble copying and pasting from an email.
SOLUTION? A link, IN THE PROGRAM, that the user can click that allows them to enter their email or other inforemation, which then goes out to my system and grabs the license file. I only keep the license on the site for a given amount of time to prevent duplication.
Simple. Maybe not perfect, but it has definitely met my needs.