Ed,
happy new year to you & the users & board members who read here as well!,
guess the reminder everybody got by entering eQSL the last days ('06 resolutions) made a good starting point.

Repeating that from time to time could help a bit. But it won't help in case of the numerous registered users, who simply don't log in anymore.
May be, a service message, generated by the system automatically to all who didn't log in for, say 6..8 weeks changed things.

On the other hand, possibly several users, who dislike this kind of "pressure", refused from using the service then.
Anyway, I appreciated it, since I guess, it helped to increase the qsl-return.
i.e., I'm also still waiting for cards for successful skeds arranged via eqsl..
by getting them and the expected/ unanswered others I was much closer to my eDX100

take care,
Tom
DL4NSE Tom Klaschka