SDTS is online!
By now you've seen a few members with "Send Work Now" buttons on their listings. Senders who find these members on the NAPPS website can send work to them securely whether they use third party software or not.
NAPPS worked with Secure Document Trading, Inc. to allow NAPPS members the ability to send and receive work securely and quickly without using email. As a NAPPS member, both you and your client can use the website to website interface for free!
If you don't have the invitation email that went out in early May, just drop a note to Support@SecureDocumentTrading.com and a representative will be happy to help you sign up!
Disclosure: A company I own provides the web to web version of this service at no charge to members, senders, or NAPPS.