It depends on how your InfoPath forms will be deployed to the SharePoint server. Simply said, you have two options here, you can deploy your InfoPath Form Template to
a SharePoint List or a SharePoint Form Library.
If you go with the SharePoint List option, you will need to have both
SharePoint Workspace 2010 and
InfoPath 2010 Filler installed with your client machines in order to meet your requirements above. Basically, you need to use
SharePoint Workspace 2010 to create a Workspace; it will allow you to syn the SharePoint list you created. You can open your list item or create a new one in SharePoint Workspace
2010. SharePoint Workspace 2010 will automatically open InfoPath 2010 Filler (if you have it installed) for your items in this SharePoint list. Note that you will not be allowed to syn a SharePoint Form Library using InfoPath forms in
SharePoint Workspace 2010
If you go with the SharePoint Form Library option, you only need to have
InfoPath Filler 2010 installed. Remember that when you are creating your InfoPath Form Template, you need to have the submit options configured (via Data->Submit Form -> Submit
Options) and have the submit button enabled from the ribbon (File -> Form Options -> Web Browser -> Submit). Then you need to publish that InfoPath Form Template to the portal, After that, you should be able to use
InfoPath Filler 2010 to open an InfoPath Form Template you published or an existing InfoPath Form you created previously. You can save the data locally and you should see a Submit
button from the ribbon within your InfoPath Filler 2010. If you don't see the submit button, that is because you have not define your submit options in InfoPath designer yet. This submits
button will push the data back to the SharePoint portal.
You may find the following posts helpful as well.
http://msdn.microsoft.com/en-us/library/ff961896.aspx
http://msdn.microsoft.com/en-us/library/ff961895.aspx
