And for those that want a free office program
{open source = free}
OpenOffice.org 3

[OpenOffice.org 3 is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose. ]

http://why.openoffice.org/
http://why.openoffice.org/why_great.html

They're still working on the sync features of Windows Office 2010 for some mobile devices so keep that in mind before you switch, or do as Southie suggested and keep both versions because that is one situation that the 2007 version comes in handy. I find that Outlook 2010 has less force closes than the 2007 version. I haven't done too much with the other parts since I've installed it several months ago (the beta version.)

Unfortunately, OPEN OFFICE, from Sun Java, is not the same
as they used to be - regardless of what you are running on:
Mac/Apple, Windows, Linux, etc. For their latest revisions
actually contains "hidden" spyware and keyloggers.

Some people have become confused as why their desktop
now has Wi-Fi when they do not have such feature. While
for example Iprip - is a valid Widows file but IPRIP is not,
which is aka PRIRI which comes in various mutants and
trojans, more often than not are keylogger(s), just for an
example.

The problematic issue here is, it is not found under Open
Office as it installs a program hidden where it overrides
all securitys including Malware, Spyware, Adware, etc -
and enable itself. Getting rid of that is a major pain, some
thin that was not the case a year ago.

On top of this - MS Office does have PDF, XMS, XPS, Math,
and other add ins, plus securities which protects upi as well
as 203 which offers even more - securities plus encryption.

I couldn't find any info about that, do you have some articles or links on it?

Just got this in a newsletter-

[Office 2010's Web tools raise security questions

By Yardena Arar

Microsoft's newest Office adds some nifty Internet features, including easy access to shared documents via SkyDrive and PowerPoint Broadcast.

But putting personal and business information into the cloud opens up potential security risks that all Office 2010 users should be aware of.

Microsoft says it has done its best to balance conflicting demands of convenience and security. Still, security experts say Office 2010's Web-connectedness could present new opportunities for snoops and hackers.

This concern isn't about some obscure Office capability — these potential threats touch on at least two of the suite's coolest new features: SkyDrive and PowerPoint Broadcast. The former lets you easily share documents with colleagues, either via Office desktop apps or the new Office Web Apps. And with a simple Web link, anyone with a free Windows Live account can now run a PowerPoint 2010 slideshow, viewable by any remote user with a desktop browser.

At the very least, people who use these features should understand exactly what degree of security is and isn't provided.]
http://windowssecrets.com/comp/100701/