Bummer about Cingular not working.
I went ahead and looked through the Cingular manual and couldn't find a DUN section at all (could be I missed it). The
sprint manual has a section showing how to set up DUN on a windows box (hey, nobody is perfect :tongue: ) on page 77 and there it mentions to dial #777. It is probably a different number for your carrier.
Anyway, hope this helps someone somewhere.