Everyone has been all over this already today, so there's really no point in providing a source other than "Houston media says..." but #1 overall pick Carlos Correa has officially signed with the Astros. There still isn't an official confirmation on how much he actually signed for - but I doubt there will be, unless it gets leaked. I don't think we're going to get any hard numbers on signing bonuses until after the deadline. Why? Since signing picks is basically now a subtraction issue: $11.2m - X - Y - Z = "My client wants $11.2m - (X+Y+Z)"
Kevin Goldstein addressed an interesting point, when he said that Correa's signing will have "Zero" impact on subsequent picks. That makes sense, because there's still a hard slot number with a penalty for going over the allotted sum.