Webform as Chart Source

Don't hate me, but I'm evaluating WA DWcharts against FushionCharts.

Custom SQL Recordsets
One big deal is that with Web Assist I can't attached a record set as the datasource for the chart. This means I lose out on the ability to easily create complex SQL queries unless I go through that what seems to be a tricky copy and paste and tweeking with the XML editor. Is this really the only way to get a custom record set into WA DC?

Web form input as datasource.
A common and very useful application of charting is to allow visitors to type in data and have you perform some type of calculation and display a graphical analysis. Savings calculators like this are a good example RothIRA.html
Ugly formatting but it gets the point across.

These are the main uses of the charting tool for me right now.

FYI - FusionCharts has hands down the most impressive looking charts with 3D, 2D, combined and more. Over 100 styles with animation. You can also attached directly to a record set without any XML manipulation needed. However, the load time for their graphs is painfully slow.

WA has nice clean functionality and the graphs have loaded very fast indeed. However, the extra coding and simplistic limited choices of the graphs concern me a bit. We already own it, but wanted to see if there were a few examples of webform out there we could review.

Thanks!