Several good recommendations upthread:

1. Employee Resource Groups...can be very helpful. Also employee assistance programs can be used to get some counseling help at low/no cost.
2. Look at your local gay community center...Affirmations, The Center on Halsted, ... almost always have a "coming out over coffee" group or something like it.
3. Volunteer work can be very helpful to getting involved in the community. Churches, political groups, etc.
4. Have him take some time for personal reflection/mourning on what he's losing, and gaining.