Somehow I've signed myself up for a bunch of newsletters from various companies whose services I don't even use that update me on new features they've implemented in addition to blogs from their employees. It's an interesting read from time to time so I haven't unsubscribed.
If you can provide a service which can guide other people through publishing the same type of useful/interesting/insightful information regardless of the size/scope/nature of their project/research/work/business/hobby...
This idea is actually really exciting the more I think about it. Keep at it!
But the landing page needs more information, yes.
My absolute biggest pet peeve with changelog emails is that they just say "Hey I'm Tony from Initech and we just added a new feature to BigBoomBlaster!!". I'm sorry who is Tony, why do I care, why did I care when I signed up for this list, what does this product do? What is an Initech?
I sign up to a lot of things, I need that taster of information to remember which of the 30 things I signed up to this week is emailing me without a hint as to who they are. No the domain name doesn't count, I didn't even read it when I signed up. The product already got me hooked enough to sign up for this thing, just remind me what it is and I'm all ears.
Integration with customer SSO, to provide different info for prospect/trial/paying customers or customers with different verticals/needs similar to the marketing landing page concept