It's been on the CD of "Plays", that's why I'm asking... and I'd hate to miss out on the new alternate takes by buying the Mosaic LP set (which I'll probably rather do than getting the Hip-O, now that I have the choice... but then the Mosaic price will be even more ridiculous than the Hip-O, I assume...)
They mentioned the quartet date with Rowles, Whitlock and Roach in their e-mail and on their site, so yes, I guess it will be included. As it looks now the 1952 stuff will not be included, so if you want it you'll have to get the Hip-O Select set - unless Mosaic will include it after all.