Microsoft's new browser, Internet Explorer 7 (IE7), is now available for download here. I installed it on my MacBook Pro running Parallels and it works just fine. Danny Sullivan has THE article on the search side of things, i.e. the default search engine war for the toolbar search feature. The article is named Searching Via Internet Explorer 7 & The Battle To Be The Default Search Engine a must read.
One comment somewhat related to search at WebmasterWorld is this funny remark;
The biggest disappointment is that there is no animated paperclip to utter profanities such as 'It looks like you are writing an email, do you want to see help with writing emails?', 'It looks like you you are trying to search with Google, do you want to change to Microsoft Live search' or even 'You searched for uninstall this *$#!, do you want me to *#!#$ off?'.
Forum discussion at WebmasterWorld.