First off, I really encourage anyone reading this post to move towards google chrome or mozilla firefox. Internet Explorer is best dying a slow death in my opinion. Too many security vulnerabilities, and it’s javascript engine is way slow.
In some situations though you do still need Internet Explorer. Today I had a colleague ask me about running proprietary Microsoft software like Internet Explorer on linux. This is easily accomplished using the many free virtualization packages like vmware and virtual box. I personally prefer virtual box, I run this on Ubuntu 10.04. Once you have virtual box installed, simply install a windows xp or windows 7 guest. The performance is really quite good, and you’ll have easy access to Internet Explorer 8 and 9 as well as proprietary email apps like MS Outlook.