Internet Explorer 7 is safer in Vista because it runs in "protected mode". This does not allow a website to take over your PC without permission. IE7 for XP does not offer this level of protection. Vista "protected mode" Security for this reason is much improved over XP. Vista will not allow any changes to the core components and files. This protection is only one of several protection systems in Vista.
IE7 RSS reader.
Vista Mail offers better spam filtering.
Email creation below.
Vista Mail offers an integrated Calendar.