Bobby points to a claim that employers are paying a premium for WebSphere skills (amongst others).
I was hoping to use Google Trends as a lazy way to demonstrate graphically why this is but the results for WebSphere are inconclusive.
SOA, however, is quite remarkable. [I'm assuming I can discount the non-IT-specific Dutch contribution to that chart by assuming it was constant across the period in question]
In situations of this sort, it is customary to joke about asking for a pay rise. I know I should resist.