This post has been left for historic information. The PET microSD is no longer in production. The replacement SD2PET is available now, more information on the pre-order page.The latest batch of pet microSD boards are ready, and they have changed a bit, they've gone blue!
There are also a few other minor mods, most notably the package of the 74LVC125A buffer has been changed to give more room around the other components. The power LED is also now blue to match, green for activity, red for error.
petSD+, available from Dave Stevenson. Here it is without the display:
mount internally in a 8032-SK or 8096-SK.