Internet Explorer 8 and NIS 2009

I am running  Windows Vista 32 and NIS 2009

When I did my usual 2nd Tuesday of the month windows updates and I opened internet explorer, It said I could download internet explorer 8. I still have Version 7.0.6001.18000.    

Has anybody that has downloaded IE8 had any problems with IE 8 and NIS 2009?

Has IE 8 been out awhile?

Should I wait and download it later?