Hi April I have tried an ironing board for blocking my crochet. I now use an insulation board. I just did a blog post and video of Blocking Crochet. My method is not expensive and works very well. http://www.purplebutterflycrochetcollection.com/?p=1732 Hope it helps.
Blocking wires are nice. There is a great tutorial on Knitting Daily website. http://www.knittingdaily.com/blogs/howto/archive/2009/05/06/using-blocking-wires-to-block-a-lace-shawl.aspx There are also several DIY projects you can find on the web on how to make your own using supplies from the hardware...