Can blockchain.info control which address BTC is sent from, is this suggested?
Yes, this is so that we can confirm afterwards that you are indeed the rightful owner of the iotas.
Also is there a minimum $$ amount that needs to be raised to continue this project?
There is no exact number precisely because it's new technology, there are way too many variables. We're quite confident that we'll have IOTA done for testing by Christmas.
From the Risk Paper:
As the IOTA team plans to spend the proceeds of the IOTA crowdsale on development of
IOTA, Jinn (IOTA hardware support), marketing and community growth, a negative
fluctuation in the fiat value of Bitcoin could leave the project without sufficient funding to
complete all the milestones and goals.
What are these milestones & goals?
1. IOTA Software
2. JINN Hardware support for IOTA
3. Building a healthy ecosystem for IOTA