Yes, that is what's cooking at CRM for App Engine - iFreeTools CRM.
The Opportunities Pipeline Chart (aka Sales Potentials Funnel chart) is a standard chart in almost all CRM application. iFreeTools is now working towards providing the same as part of the next upgrade.
Not sure, if this is going to be a simulated funnel shape (which underneath, uses a normal bar chart)...
or if it going to be a simple bar chart (with not exactly the typical funnel shape)...
The problem with adding a dummy column is, that space is click-able and can confuse users about the actual value..
Let me see what I can do. Until then, have a nice weekend !!
And, as always, feel free to send in your suggestions to me, on what you want to see added soon, in iFreeTools CRM.
Sales Opportunities Pipeline (Funnel Chart) is now available in iFreeTools CRM