One challenge developers face in using these new technologies is that they are not yet supported by Internet Explorer.

Developers cant afford to ignore IE most people use some version of IE so they end up spending lots of time implementing workarounds or limiting the functionality of their apps. Google says it will encourage IE users to install Chrome Frame, once the Wave preview is extended, and IE users will see the following message when they login to Google Wave. Then they will be running Wave in a speed that equivalent to that of Google Chrome.Google Wave depends on strong JS and DOM rendering performance to provide a desktoplike experience in the browser.