MacMall.com has a number of nice accessories for iPad, iPhone, etcetera on sale right now. I love the Apple Store, at retail and online, but they’re not the only source. MacMall’s been around for decades, first as a direct mail catalog and now online.
I’m aware of MacMall and some of the other Mac retailers. The only reason I mentioned the Apple store is as a possible data point in support of the article. The Incase Slider for iPhone 4 exists, and is available other places. Apple has a relationship with Incase, and carries the slider case for the 3GS. That suggests — but is, of course, far from conclusive — that for some reason, possibly the one cited in the article, they don’t like slider cases for the 4.
The main reason I checked store.apple.com is that if they *did* carry the slider case, it would be a pretty strong point in debunking the article.