The cross-linking of data was the primary reason for creating doogiePIM. I've recently added the ability to hyperlink words and images to specific words and other images within the Documents and Noteboard. This is detailed on my dev blog entry here: https://bitespire.com/community/239-one-link-to-rule-them-al...

Major versions are roughly 18 months to two years apart with at least a 50% discount for the upgrade. I was thinking about a subscription basis but thinking from the point of view of a user, I wouldn't like that myself. I think this is a fair compromise - users get a good deal and I get a little something to replace my flux-capacitor every couple of years.