Pydap is a pure Python library implementing the Data Access Protocol, also known as DODS or OPeNDAP. You can use Pydap as a client to access hundreds of scientific datasets in a transparent and efficient way through the internet; or as a server to easily distribute your data from a variety of formats.
How different is this new pydap from the dev-python/dap from the main portage tree?
Upstream changed the name:
http://pydap.org/ is the 3.x version of pydap
http://pydap.org/2.x/ is the 2.x version of dap
Might could do some fancy MY_P variables to make pydap an upgrade of dap, but it seemed easier to just make a new name.
What is funny is that I have a vague recollection that before it was called 'dap' he called it 'pydap' and if so it has come full circle.