Net Community has a function called Use email links to autofill forms"  which inserts "constituent data on forms when users click email links, select this option. The program pulls data such as addresses from constituent records even though users are not logged in"  It would be good if NXT and NC were joined up a bit so that you could add links to NC pages and this would work. And going forward when/if NXT can do Event and Donation forms etc that it has this function, but that it be email/page specific rather than for all pages/forms or not.