Hello,
Here is our help for our sendtoaddress command in v2.
sendtoaddress [comment] [comment-to] [tx-comment] [product-id]
is a real and is rounded to the nearest 0.000001
[tx-comment] max size is 2048
[product-id] is a positive integer (code -1)
Product support has been added to the RPC Calls so that web services will be easy to write for and utilize SWIFT.
This is going to be fun

-BitSwift