There are (at least) two easy ways to contact each other privately.
First, most MyDLV members have their e-mail in their profile. Use the "Browse Other Members" link on the main MyDLV page.
Second, use the ChirpLite utility (link on main MyDLV screen) and you'll get a drop-down selection of users to whom to send a quick chirp. Chirps are "good faith private" and not bulletproof particularly if they are set to go to cell phones and external e-mail addresses.
Any other questions please ask.