I was trying to find out whether some one has done comparison of SOA tools and products in past or not. I wanted to share my thoughts comparing SOA products but I found people have already done it for you. Still I will do some homework and will come back with my comparison till then enjoy these resources on internet for SOA product comparison

Current Analysis

http://www.currentanalysis.com/p/BusApp-abstracts/AppInfra-SOA.htm

ENTERPRISE SERVICE BUS: PRODUCT EVALUATION COMPARISONS
http://dts.utah.gov/techresearch/researchservices/researchanalysis/resources/esbCompare061018.pdf

MyArch Solutions

http://myarch.com/comparison-of-soa-suites

Network Computing

http://www.networkcomputing.com/channels/appinfrastructure/showArticle.jhtml;jsessionid=CKJYQ2X3W1HY0QSNDBECKICCJUMEKJVN?articleID=181501276