Printable CD-R's only make sense if you have a band, a recording studio or a small software company. I have seen several inkjet printed CD-Rs and they do look very professional. Most people wont be able to tell if they are homemade or not.
I bet the Memorex printable CD-R's will proably be made by CMC. I wish Memorex would use Tayio Uden, or even Prodisc and Ritek more often instead of CMC.
Many of the "gimmick" CD-Rs avaliable (different color dyes and sizes) are made by Tiawanese companies like CMC. The TDK American flag CD-R's that are on sale this week at Best Buy are made by CMC.