Curious about the subject, I did a little research of relevance.
I don't know if he wasd the first, but Vagabond mentioned the Sigel Jones match on June 13. It was still a rumor at that point, and I'd heard about it, too, from my sources, perhaps around May 31. The IPT press release, in which it proclaimed itself to be a huge money 8-ball tour, came on June 30. Timberly started a thread posting the entire text of that press release on July 3 on the main forum.
The purse money shook the pool world, as $225,000 for a one-match exhibition was without precedent. On the forum, in July, many of us wondered why Loree Jon had been chosen rather than a WPBA star such as #1 ranked Allison Fisher, and several claimed to have learned that Allison had been offered the spot first, but declined.
At least here on the forum, the IPT was pretty big news by the first week of July.