I've been researching this topic recently as I'm planning to move my veggie beds from the front garden into a dedicated area out the back. I have been wanting to do some wicking beds but was put off by the cost of the water cubes used. I've found a few more ways to do this. Here are some links in case anyone else is interested.
Original inspiration from Costa.
http://www.sbs.com.au/shows/costa/listings/detail/i/1/article/6172/wicking-garden-beds
Using ag pipe, stormwater pipe and even plastic storage crates.
wicking bed you tube clips
http://www.youtube.com/user/colinaustin1000/videos?view=0
http://www.youtube.com/watch?v=q5fkvcEH_CA
http://www.youtube.com/user/WaterInstallations?feature=watch
http://www.youtube.com/watch?v=dwh2BQ3BBmI
http://milkwood.net/2010/05/11/how_to_make_a_wicking_bed/
http://www.creativepumps.com.au/zpumps/pond_liner/epdm-pondliner/epdm-1mm-pondliner.htm
http://www.merribeeorganicfarm.net.au/
http://wickingbed.com/
http://www.urbanfoodgarden.org/main/wicking-beds/wicking-beds.htm
http://shecooksshegardens.com/2012/10/wicking_bed/ This link to a blog is refusing to working this morning but the link usually works.
Related PDF's
http://www.mvcc.vic.gov.au/for-residents/environment-programs/my-smart-garden/~/media/Files/ForResidents/Environment/My%20Smart%20Gardens/Wicking_Bed_Fact_Sheet_Feb%202012.ashx
http://earthwisewa.org/pages/wicking.pdf
http://permaculturewest.org.au/resources/pw-wicking-beds.pdf
http://www.waterright.com.au/wicking_bed_technology.pdf