[fastpat]

I have a number of retaining walls to build here, and have looked at a number of types of blocks. I've not considered pouring my own, but I may if it appears feasible.

http://www.anchorwall.com/HomeOwners/HomeOwners_Index.asp

http://www.allanblock.com/

http://www.ultrablock.com/LOCK-BLOCKDetails.html

http://www.airvolblock.com/

There are many more, but I'm impressed with the Allan block type because it has many shapes and looks like cut stone.