According to Canon Rumours, Canon have officially discontinued the following items
Canon Speedlite 580EX II
Canon EF 24 f/2.8
Canon EF 28 f/2.8
Canon EF 24-70 f/2.8L
From what I gather the EF 24-70 f/2.8L is already difficult to source. As for the others, the biggest loss will be the Speedlite 580EX II.
Whilst the newer 24 and 28mm will probably be an improvement over their older and optically inferior predecessor, its a shame that Canon have seen fit to hike the prices of the 600EX and 24-70 MKII
Canon Speedlite 580EX II
Canon EF 24 f/2.8
Canon EF 28 f/2.8
Canon EF 24-70 f/2.8L
From what I gather the EF 24-70 f/2.8L is already difficult to source. As for the others, the biggest loss will be the Speedlite 580EX II.
Whilst the newer 24 and 28mm will probably be an improvement over their older and optically inferior predecessor, its a shame that Canon have seen fit to hike the prices of the 600EX and 24-70 MKII