Stevie boy has passed along a piece of ebook info at the iPad launch today. He's reported that over 1oo million ebooks have been downloaded from iBooks.
Of course, "100 million downloads" refers to the number of downloads, not sales. Based on the several people I've talked to, ebook sales in iBooks are not nearly that high. And how could they be? iBooks only has around 90k titles from about 2500 publishers.
In other news, Random house ebooks started showing up in iBooks this morning. All 17k titles currently published by RH are expected to be available soon.