Please dig that up if you can! I found that error on 2.6 but it was fixed at some point leading up to 2.7 - the fix that I tried, without success, was to import sys and increase the recursion limit via sys.setrecursionlimit. No luck at all.
Also, I've got a sample of threading that works fairly well in the SSL TPS reporting tool that I worked on a while back. You can have a look at that code here:
http://devcentral.f5.com/wiki/default.aspx/iControl/SSL2048bitKeyTPSReportingTool.html
At some point Suds will support async frameworks like twisted, but that's a whole other ball of wax. It'll be handy when it's there, but for now threads are totally the way to go.
-Matt
Nimbostratus