By IE, I assume you mean IE8-; IE9 has an excellent SVG implementation, and IE10 continues to improve.
Chrome Frame is an excellent option, especially now that it doesn't require administrator privileges to install. I wish I could recommend SVG Web, but it's still work to use, and necessarily slow. You can use D3 without SVG, but there are other DOM incompatibilities with IE8-, and besides, you can't do much interesting stuff without fast JavaScript and vector graphics. (And if you're generating static graphics, there are easier ways.)
The best option, of course, is to do whatever you can to get your users to switch to a modern, standards-compliant browser. If we all move forward together, it gets easier.
Chrome Frame is an excellent option, especially now that it doesn't require administrator privileges to install. I wish I could recommend SVG Web, but it's still work to use, and necessarily slow. You can use D3 without SVG, but there are other DOM incompatibilities with IE8-, and besides, you can't do much interesting stuff without fast JavaScript and vector graphics. (And if you're generating static graphics, there are easier ways.)
The best option, of course, is to do whatever you can to get your users to switch to a modern, standards-compliant browser. If we all move forward together, it gets easier.