Since you mentioned the possibility of sending the list by email, I was wondering — would it be possible to get the list of all Bitcoin addresses with a balance
The email thing was a joke, mailboxes can't handle 1.5 GB compressed data.
in addition to that, include the date of the first transaction for each address?
It's probably possible to get that data from
Bitcoin block data (1013 GB): inputs, outputs and transactions, but unless someone makes me an offer for this, I wasn't planning on adding this.
Allow me to be curious: what would you need the date for?