Willey Plus does not support iPads. Isn't this a selling point Apple should be interested in correcting

I think apple sees it more as it's on Wiley Plus to contact them and work on making itself compatible with the iPad.

if you want to bring this to Apple's attention the best thing to do is to use the feedback link (located at the 'contact us' on the lower right of this page) and let them know. We're just fellow users here and have no control over anything.

Did they explain why it's not supported?

Since Apple is pushing it's own textbook initiative, and has it's own ebook marketplace, I doubt they're going to make a huge effort to reach out to another competitor.

Apple is cutting deals with the publishers of textbooks, they have deals in place with 3 top publishers.

If whoever that is you reference wants to publish an iPad app or make a deal with Apple, nothing is stopping them.

Ask them why they do not want your business as an iPad user.

It has nothing to do with textbook sales per se. From what I understand, the Wiley Plus site uses Adobe Flash (uhggg!) to support parts of the materials on their website. The iPad doesn't support Flash, and never will. It will likely be up to Wiley to either make an app for the iPad, or modernize their website to use a Flash alternative. Flash is going the way of the Dodo, so it's only a matter of time before they are forced to choose one of those options.

I agree that the Ipad is not supported but find it strange that the site seems to work well on the iphone, strange isnt it?

Yep. I just brought home my brand new iPad 2, and my heart sank when I saw that WileyPlus isn't compatible. It's particularly frustrating because part of my justification for buying the iPad was that it would be useful for school (well, among other more fun things) and a bit more comfortable than reading from a laptop. I would hope this isn't a matter of brand competition, as Wiley is a requirement by my professor, not just some random vendor I picked as an e-reader. Oh well. Wiley does have some apps for iPad, so maybe they're working on a solution.