Just a quick note, if you commonly access a Sharepoint site which isn't in your own domain.  If you haven't already, then once you upgrade to IE 7 you will want to add that site to your trusted sites list in IE.  Failure to do so will result in that almost ever present information bar at the top of the page letting you know that the site is trying to run one of several different Active-X controls.  The challenge - if you don't allow these controls to run, then for example you can't use the Sharepoint drop down to Edit a Word document in Word - instead you'll get a warning about not being on a compatible browser.  You'll have similar issues with Team Foundation Server (TFS) based Sharepoint site access.

To change this setting:

• go to the 'Tools' menu (now located in the lower right corner of your IE menu bar).
• Select 'Internet Options' which will open the dialog which you probably remember from IE 6.
• Go to the 'Security' tab.  On this make sure you select the 'Trusted Sites' icon in the image list.
• Use the 'Sites' button which will be active to open the 'Trusted Sites' dialog.
• Type the url to the top level of your site of interest, for example: http://Sharepoint.Microsoft.com
• You may need to uncheck the "Require server verification (https:) for all sites in this zone' checkbox if your Sharepoint site does not use HTTPS.
• Use the 'Add' button to add the SharePoint site to your list of trusted sites and close the associated dialogs.