The following is controversial, but comes from Woody Leonhard at Windows Secrets Newsletter. His opinions reflect mine, at least as far as Windows 7 protection goes:

http://windowssecrets.com/links/cg90ttlyrmofd/76bc27h/?url=WindowsSecrets.com%2F2011%2F05%2F05%2Fts%2F%3Fn%3Dstory1

Some highlights:

Paying for antivirus doesn't improve protection

You don't need to defrag your drives any more

Drop your old backup program and use Win7's

OpenOffice is not a slam-dunk replacement