Yep, Verbatim's 8x is shutting down, if I remember correctly, so they can concentrate on 16x production.
Also, while Verbatim traditionally is good, you might get a great spindle or a mediocre one, depending on who made it (CMC or Prodisc) and storage conditions. I ,for example, have a 100 pk from Amazon I bought, but the PIF are mediocre at best. They have a + in the middle of the serial number, so they are Prodisc made and should be giving me about 400-500 PIF max at 8x burn. However, I'm getting 1200-1600 PIF, which is mediocre at best. So, although the disks look fine, have no hub cracks and no dye spotting, they were likely older stock that sat around for a while. So, if you're getting Verbatims, it might be a bit of a crap shoot. I certainly would not buy from Amazon again b/c of their sorry packaging. If you must get them, get them from someplace like NewEgg.