Ahh, well here's hoping we get 32bit back. Would hate to downgrade QT to use armory on my laptop.
We said we'll deliver next version
1) Can I use my own rpc user / pass with armory or does it have to be those supplied when installing armory ?
Not if you use auto bitcoind. With BitcoinQt you can set your own RPC password
2) If when setting up armory, you import an existing wallet from the QT client. If something RPC's in to the node and modifies the wallet by making new ones with labels etc. Since during Armory setup you requested to import the existing wallet. Do changes made to the wallet via RPC continue to import over ?
No, Armory and Core wallets are completely different. You can't import Core wallets into Armory as is, you have to import the private keys, which will become part of the Armory wallet. New private keys created in the Core wallet will be unknown to Armory until you import these too.
I'll have to read up on auto bitcoind, I've seen it referenced a few times. As for the import thing, could armory be told to "look" for changes and import at x intervals ?