I agree that the X360 did not get a price cut in 2009. The only thing they did was increase the size of the HDD, which is commonplace to do regularily in this gen (just look at PS3: 60GB--> 40GB--> 80GB -->120GB in less than three years).
X360 Nov 2005: $299/$399
X360 Fall 2007: $279/$349
X360 Spring 2008: €199/€299 (Europe only)
X360 Fall 2008: $199/$299 (€179/€239 in Europe)
So only two price cuts in North America and three in Europe over the course of four years!