I don't talk too much about products, but I need to mention these lavaliers I bought months ago from Giant Squid.
It was $30 plus shipping and I also feel I got quality lavaliers (compared to other brands I experimented with). The store owner is Darren Nemeth, you can contact him at firstname.lastname@example.org.
This is the cardioid lav I use with my Zoom H2 and also the Olympus DM-520 digital audio recorder that I place inside an eyeglass case (I've drilled a hole into the end of the eyeglass case so the audio cord can pass through).
Such a deal!