Gecko or Webkit tWebbrowser
With Windows 7 not being shipped with IE in Europe; one will quickly need choice for embedding a webbrowser inside a delphi App. IE base only won't cut it!
Gad D Lord commented
Delphi Chromium Embedded is available as well and it actually works. The only drawback is that you plan having Unicode support the distributable size becomes around 20MB. Worth checking though - http://code.google.com/p/delphichromiumembedded/
There is a "Delphi Gecko SDK" avaiable at http://ftp.newbielabs.com/Delphi%20Gecko%20SDK/. Not sure if working but worth google-ing for "Delphi+Gecko"
AFAIK is the IE always included but invisible as a program. The IE component is the base for so much application that would break so MS cannot omit it.