RedMonk's Cote' has a great SOA summary here:
The questions I've started asking when I hear a story about how great SOA is -- how much better a customer's IT-scape is doing because it's now got "SOA Inside!" -- "compared to what?" That is, what were the alternatives? The snarky, between the lines question being, "what makes 'SOA' different than 'programming'"?
I especially like the way the final question cuts through the vendor fog in the SOA mudpit.
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