Arash shows you a cool way to access a web service from a Microsoft CRM form using a little bit of JScript... The cool thing is this gives you some ability to have Microsoft CRM call a Web Service for currency translation and show the other currency in the CRM window. I am working on building this and putting it in a CRM XML File after the launch... But if you want to look at Arash's code, click here: http://blogs.msdn.com/arash/archive/2006/02/01/521565.aspx
After I wrote this, I looked at Philip Richardson's Blog (Philip is a Program Manager for Microsoft CRM Customization) He has another way to skin the same cat... http://spaces.msn.com/philiprichardson/blog/cns!E1C114B0FC9B3FE!430.entry?