I added a patch which enables scrolling via the touch UI for org.eclipse.swt.widgets.Tree and Table instead of using scrollbars.
The patch can be found at: http://user.fh-frankfurt.de/~rc9000/...ee-table.patch

A compiled version of SWT with this patch applied can be downloaded from http://user.fh-frankfurt.de/~rc9000/...t/experimental
So far everything worked nicely here.
Please let me know if this works also well for you.