I have many years experience reading between the lines of corporate press releases. Please listen to me. I'm not trying to be overly pessimistic, but...
The press release said "at least 40-45" S80s. That phrase is their "permission" to make it as many as they wish. And, remember less than a month ago--16Apr to be exact--they released a financial guidance statement that predicted a cut in domestic capacity in the 4th quarter 2008 of approx. 4.6%. So, in less than a month they have more than doubled their estimated cuts in domestic capacity. What makes you think that they have now given the final word?
They also have hedged their bets on International growth. On the Jetnet Q&A there was a statement that said "We still expect our international capacity to grow slightly compared to 2007, although not as much we had planned." Note the word slightly.
Also, note the repeated use of words like "plan," "expect," "estimate," etc. They have made sure that they can not be held to a single statement in the release by the financial community or the unions-- particularly if they decide to make the cuts even deeper. If oil prices continue to rise, you can just about bet the rent money that the cuts will be deeper.
IIRC, those 39 737s are to be delivered over the next 3 years, are they not? I didn't think they were all coming in 2009. Also, unless the new configuration is substantially over 150 to make sure that 4th f/a is more than paid for, don't forget that seating configurations can be changed in an instant on a/c that haven't even been delivered yet. If they are saying up front that the ASMs are being cut 11-12% in the 4th quarter, I don't think they are looking at the 73s to restore those ASMs, just replace additional a/c they will ground (but haven't announced) when the 73s are delivered.