going to pay a visit to that site, too, then... I enjoy the old BN covers a lot, such as the ones in the following posts - they're largely unknown nowadays and don't seem to be part of the glory of BN's design fetishism, alas...
seems I can't link to them, but go have a look here: http://www.gokudo.co.jp/Record/BlueNote1/index.htm
The Art Hodes ones are great! Also the Roach/Moody/Dorham/Blakey.
Mezz Mezzrow (7023) is another good one, and all of the Gil Mellé ones are great (I printed them and keep them in my 2CD set!). Both Julius Watkins are good, too!