As someone else mentioned on here, go to ISRG ticker and see the update from last Fri stating that ISRG will be added at the end of this week after the close. The article is titled "ISRG being called up" ie to the big leagues:)
Listen, I can't say more without giving away too much info and possibly getting my source fired, but I'll give you this one more tidbit of information.
On May 29, 2008. Members of MasterCard's senior management team will provide updates on the company's operational, business and product initiatives. Also as previously announced, the company will provide an update of its long-term performance objectives. The live web cast of the meeting begins at 9:00 a.m. ET and will be available on the Investor Relations section of the company's website at www.mastercard.com. Here's the link...
All I can say is that if I were you I'd be long MA shares no later then 5/28...the day before the CC and especially before Fri., May 30, 2008 when another more significant announcement will be made I was told. Remember, that date is also significant because it almost marks to the date the third year anniversary after MA went public, and the reason I was told this *significant* announcement was scheduled for that date, i.e. S&P inclusion to be more precise.