The Sneak Preview: ABAP Edition is now available. Kathy just announced it in the forum: Sneak Preview Update: ABAP Edition just released!!
The link to the Sneak Preview stays the same: https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/uuid/cfc19866-0401-0010-35b2-dc8158247fb6
Basically this is a "slim" or "mini" ABAP installation with a compressed database component, comparable to the "slim" Java version. It's supposed to run with a minimum of 1GB but 2GB RAM is recommended.
Feedback on this edition, like the others, should go in the SDN Code Sample/Download forum (Software Downloads).