I don't have much new information to share on the Echols/Rodman/College Science Scholars front, but here's what I know:
The Echols Program is aiming to mail their invitations or "Thursday or Friday".
The Rodman Program is doing their printing/stuffing. I didn't get a concrete date for their mailing.
I believe that the College Science Scholars Program made final decisions earlier this week and should be printing their invitations by now.
It looks like many will receive their admission decisions before invitations to these programs arrive.
As for questions about when letters will get to you, I can't be certain. Once letters leave UVa they are in the USPS's hands. I imagine that a few of you living in Central Virginia might get letters on Saturday, though you probably know how quickly your mail comes better than I.