Clear instructions will follow on what to sign and how and when to do so.
Blockchain.info does support signing with an address last time I checked so it should be ok, though I'd advise against keeping large amounts in an online wallet. I've heard too many horror stories... e.g.
http://www.reddit.com/r/Bitcoin/comments/1pxcif/i_just_lost_301btc_70000_on_blockchaininfo_use/
No update yet from Hashfast, though it's only 3pm there (San Francisco) at the moment. They're working hard, and are normally around till around their midnight these days so I'm going to grab a few hours sleep and ping them again when I come back online.
"I had used 2 factor authentication with Coinbase, but did not have it enabled for blockchain.info"
Anyway, this is all new to me, so, my address at Bitfunder is not just for Ice.Drill and I'll have to sign that address for other securities also, is this a problem?
no
Great, let the transfers begin...