We only use PHP for our general/ content-oriented Web pages. For the valuation suite (for which there are free trials under DEXISION - Real-Time Financial Engineering.) we use things like modPython, JavaScript, SVG. Nevertheless, I'll have another look at Django - so thanks for the suggestion.Yves, I'm surprised you're not using Django (Django | The Web framework for perfectionists with deadlines) for your web front end, instead of PHP. It would allow you far greater ability to tie it into your underlying valuation suite.