My niece's wedding cake is sitting in my fridge right now, all supported with cake jakes. I love those things! No cutting, no wondering if I got the dowels cut exactly. I don't do many wedding cakes, but each one I've done has had the cake jakes. I've been very happy with them.
Cake jakes are plastic dowels that have a screw top that allows you to adjust them to whatever height you need. There are two standard heights (3" and 4") and then they adjust higher as needed. And they can be used over and over again. Wonderful little invention for those of us who hate to cut dowels!
I absolutely LOVE cake jacks!!! 
That's all I have been using for the past 8 years (or longer)! I have plenty of both on hand (and have used both). But I find I use the 3" most often. That could be just the way I do my cakes, though. Try them out ~ I cannot imagine you'd be disappointed! 
You can also see cake jacks at countrykitchenusa.com
the block is sugarcraft. Not sure why it did that.
It is blocked because that site is banned from CC and many CCers are banned from that site. Long story, not worth getting into. Go to Country Kitchen or better yet Global Sugar Arts.
Here's another thread on cake jacks that includes a picture.
http://forum.cakecentral.com/modules.php?name=Forums&file=viewtopic&t=589232&postdays=0&postorder=asc&&start=0
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