SharePoint 2010 is the new version of SharePoint server from Microsoft. Which is both good and some what disappointed news for people. Don't get surprised. Good news is, it is very efficient and most performance server than it's previous version. SharePoint 2010 will work almost same as IE version on other browsers Mozilla Firefox and Safari. SharePoint 2010 is including plenty of features available and I will publish them soon. Bad news is it only works for 64-bit. So you need to change your hardware and software!!!!
- SharePoint Server 2010 will be 64-bit only.
- SharePoint Server 2010 will require 64-bit Windows Server 2008 or 64-bit Windows Server 2008 R2.
- SharePoint Server 2010 will require 64-bit SQL Server 2008 or 64-bit SQL Server 2005.
Because of adding some functionalities to work for Mozilla and Safari there are very less chances that it will work on IE 6. Now a days I think there are very minor percentage of people who are still using IE 6 on their machines. If they want to view SharePoint 2010 then they need to upgrade to latest versions.
You can find more details about it here.