Just bought the following rear snap cover for my iPad 2::
XtremeMac Microshield SC
Durable ultra-thin case for iPad 2
Works with Smart Covers
$29 at Office Depot
Nice feel to it. IMO just enough of a grippy feel. Not slick at all
Fits like a gloves
Searched all over the web since I felt it was a bit pricey but couldn't find it. Some are very close but not that exact one. So be careful. It's not even on their own web site.
It's also available in clear.
Hope this helps someone.