No, there is no need for me to add more custom properties to the profile, you should copy/rename your mojoProfile.config to something else like mycustomprofile.config and then set it to use your custom file in user.config like this:

<add key="mojoProfileConfigFileName" value="mycustomprofile.config" />

That way it won't be over-written or lost when you upgrade.

Personally I think its a mistake to put any email address on your public profile without obfuscating it in some way (like  joe dot audette [at] g mail dotcom) from the spam scripts, otherwise they scrape the email from your site and you start getting more spam.

Hope it helps,

Joe