Hi Aryanos,
Yes I have. Working with Webservices in Workflow is probably my favorite functionality in Workflow because of the ease.
You must remember the following to create the folder in Sharepoint:
1. Create a Webservice integration to the DWS.asmx in the site you want to use. For example, root documents would be:
http://sharepointurl/Sharepoint/_vti_bin/dws.asmx. This will enable dws to control documents in the Sharepoint folder. If it is a subsite you would use something like
http://sharepointurl/Sharepoint/NewSite/_vti_bin/dws.asmx. You can not use the dws.asmx in the root bin to create folders in the NewSite documents folder.
2. There can be no spaces in the url path. Replace spaces with %20.
3. The URL must be relative in relation to the _vti_bin home folder. For example, to create a folder in the document library
http://sharepointurl/Sharepoint/NewSite/Test Documents/ called Test1 you would use the following URL to the Dws.asmx:
http://sharepointurl/Sharepoint/NewSite/_vti_bin/dws.asmx
and the following URL:
Test%20Documents/Test1
It is generally easier to avoid spaces completely.
In addition, using the root _vti_bin will create the folder in the root documents.
I hope this helps.
Thanks.