David Dossot gave a great talk at VanDev Meetup last week on how to decide whether ready-made EAI tools or custom coded solutions are the best fit for your organization's integration needs and culture.  

If you didn't happen to be in Vancouver last week, he's turned the talk into a blog post, which features a nice list of both strategic and technical factors you should consider when making decisions about integration.

EAI: When Tools Can Help