The only thing I can thing of here is rather complicated. I dont know if PHP is what you are going to want to be do this kind of work... 2 things possibly come ot mind:
1st If you are running Linux you could compile PHP as a cgi Module and then have cron run the php script from the command line every 10 minutes... the php script could get the webpages parse them out and then store them in some type of CVS or equivelent type of file. Most spread sheets will open these types of files up...
2nd You could write some type of Javascript Application (But you would always have to have a browser open to that scripts page... yuck) that counts to ten minutes and then reloads the page and then does all the parsing and and writes to the CVS file.
These are the only 2 ideas I can think of using PHP (I am sure others might have other suggestions). Hope that helps...