Hi,

Infopath 2007 has the feature to work in Offline mode. You can save the form
when there is no network connection.
It provides the feature called browser enabled , Using this feature you can
open the infopath form in browser.

Offline Support

Office InfoPath 2007 stores query results in an InfoPath solution cache. The
cached data is stored in your user's profile. If you are filling out an
InfoPath form and cannot connect to your data source, you will be notified
with an option to work in offline mode. If you choose to work in offline
mode, the results from the cache will be used to populate entries in the form.

The cached data is never sent to Microsoft or any third parties. You can
choose not to have results from queries cached by doing the following:

On the Tools menu, click Options, and then click the Advanced tab.
Under Offline mode, clear the Cache queries for use in Offline mode check
box.

Check out this link to create browser enabled forms,
http://msdn2.microsoft.com/en-us/library/bb267334.aspx