Cannot open ZIP files in mail

Zips and other archived/compressed files won't work as expected on an iPad since you can't just preview/view the contents directly from the attachment currently like you can with quicktime-compatible or other common media formats. Basically you would need to be able to save the zip file to the finder and extract it, and view the contents from there. But since the iPad doesn't have anything like a user-accessible Finder, it's tricky to implement.

There may be third-party apps that deal with this eventually (or maybe even something from the upcoming 4.0 software, who knows), but it would probably be easier to just have people send you attachments that aren't zipped up for now.

GoodReader offers this functionality. For more details see:

http://markeclinger.com/blog/travel/goodreader-essential-application-for-busines s-use-of-ipad/

If something doesn't work on the iPhone, it will most likely not work on the iPad, its the same operating system basically.

Jason