You can send a private message to any Progressive U member. To send a private message, navigate to the members user profile, and then click on "send private message."
Please use this feature responsibly. In general, if you have a comment about a specific posting, it's best to post your comment using the comment feature. The original poster will see your comment and respond as appropriate, and others will also benefit from the Q&A exchange.
On the other hand, if you need to contact a member directly, check the user's profile first to see if s/he has other preferred contact channels (such as IM). If not, you can use a private message.
