I've read the Zerocoin paper by Miers et al. and understood most of the concepts.

• How do I get a zerocoin for some denomination in bitcoin? e.g. If I spend (d bitcoins + txn fee) in a bitcoin txn and get a (c, skc) pair, then is this mint txn accepted into the blockchain just like a normal bitcoin txn?
• What does it mean when they say the currency is placed in escrow?

Thank you.