I recently attended a briefing at the offices of IRIS, where IRIS introduced their new hosting proposition which targets amongst others the Not For profit Sector. The presentation was well attended by IT managers from a number of existing IRIS clients who I believe found the presentation interesting and informative.
In the excitement of understanding requirements, selecting stories for development, defining acceptance criteria, building some software, getting feedback from users and regular re-prioritisation its easy to put aside infrastructure and deployment constraints. Putting off these considerations can have an impact on your agility later in a project.