Fins,

Checked out Numbers on the iPad and yes it will now save as an Excel file. But this might be a bit better for you:

[Link: forums.macrumors.com]

I can't believe this thread has got this far and no one has suggested Google Docs.
http://docs.google.com
The nutshell:
Everything lives in the cloud, but you can backup locally into a convenient zip file with all docs.
Docs (Word import/export), Spreadsheet (Excel import/export), Drawings (Visio), and others.
Works with any PC w/IE, Firefox, Chrome, Safari, iPhone, Opera, iPad, even better on Android
Real-time multi-user collaboration
Secure as far as Google goes, and can be shared as read only or read/write.

Good idea on Google Docs..

Hopefully we will see the MS Office on the iPad app by the end of this yr. then all our issues will be solved ;)

maybe by the end of the month?
[Link: 9to5mac.com]

The problem with google docs is it isn't an app. It is online only. Of course, the CloudOn that I found is too, really. But I would like to find something that will work offline, if I don't have wifi available.

The people at my wife's work use QuickOffice Pro HD.

CJ