Dear Bhante,
I'm glad to hear that this excellent project is moving forward.
> at least one translation of a Digha Agama from Chinese available online.
Also, as you will know, there are quite a number of "orphan" translations
into Chinese of DA sutras, affiliation uncertain in most cases, which should
be included.
> One of the things we would like to do is to link up with significant
> resources [snip] So i'd like to ask the group if they've got any
> suggestions?
As far as I know there is nothing from Tibetan sources on-line -- not
surprising since Tibetan Agama materials is very sparse apart from
Samathadeva's compilation.
> What we are after is the links to:
> 1. Text, in Pali, Chinese, Sanskrit of any Digha sutta
If the volume is not too excessive, I would be happy to transcribe the DA
quotes in Shamathadeva that I can indentify as such -- there are a lot of
quotes without attribution but I think most of those are actually SA sutras.
> 3. Maha Satipatthana Sutta
I have been meaning to ask you -- have you looked at the version included in
the Artha-vini'scaya & commentary, available in Sanskrit ? If you do not
have access to the printed edition, I could scan the relevent pages for you.
Not sure about the lineage but most likely MulSA or SA.
Best wishes,
Stephen Hodge