I'll throw my opinion in I guess. Group A - Germany and Poland progess. Group B - England and Paraguay progess. Group C - Netherlands and Serbia and Montenegro progess. Group D - Mexico and Portugal progess. Group E - Czech Republic and the US progress. Group F - Brazil and Croatia progress. Group G - France and Korea progress. Group H - Spain and Ukraine progress.
This would mean the Round of 16 was -
Germany vs Paraguay
England vs Poland
Netherlands vs Mexico
Portugal vs Serbia and Montenegro
Czech vs Croatia
Brazil vs US
France vs Ukraine
Spain vs Korea
Quarters would be
Germany vs Netherlands
England vs Portugal
Czech vs Ukraine
Brazil vs Spain
Semis would be
Czech vs Netherlands
England vs Brazil
Final would be Czech vs England