So that's that then. Windows XP is no longer being sold by Microsoft to the big PC makers, and all efforts to get the software giant to give the mainstream versions of the OS a few more months have failed. But you can't fault those who tried, particularly our US-based sister title Infoworld.

Infoworld started its 'Save XP' campaign in January, and more than 210,000 people backed the magazine's efforts to convince Microsoft to prolong the life of the OS.

Last Friday, Infoworld sent Microsoft CEO Steve Ballmer a memory stick containing the names of everyone who signed the petition, along with a final plea to keep XP on the market for a few more months.

Infoworld editor Eric Knorr said in the letter that "those of us who have been in the industry for a long time have never seen anything like the negative reaction to Windows Vista", adding that the typical interval between the launch of a new version of Windows and the end-of-sale date for the previous version is two years.

"Given the disruptive nature of many Vista upgrades, we feel that Microsoft should continue to make Windows XP available for at least that long, rather than ending the sale of Windows XP after 18 months."

But the June 30 cut-off date has now passed. As we've covered several times before, you'll still be able to get your hands on XP for a few months if you so wish. But does the end of XP finally mean it's time we focused Vista, or are all eyes now on Windows 7?