Not everyone wants to share their e-mail address. I understand and respect this, although sometimes it would be convienent to do so. The current mechanism, however, prevents anything from harvesting e-mail addresses, since they're stored nowhere except in
vroom's head. Well, OK, the PM database.
The solution that I've found is send a /msg to the person, asking them if they will send you your e-mail address. You can include yours in the /msg so they don't have to expose theirs anywhere on PM if they choose.
Personally, I'm content to put my e-mail address on my homenode, or as part of my signature...
--Chris
e-mail jcwren