We need to analyze the impact of this upgrade, it's ok to start with the upgrade as part of the analysis (to find out what some of the challenges/risks are) but it's important to understand the impact of this upgrade.
I started a wiki page for this here http://www.mulesoft.org/documentation/display/MULECDEV/Spring+3.1+Upgrade
Eva did something very similar for CXF (this was quite a bit more detailed than you probably need though): http://www.mulesoft.org/documentation/display/MULECDEV/CXF+2.5.0+Upgrade
We need to analyze the impact of this upgrade, it's ok to start with the upgrade as part of the analysis (to find out what some of the challenges/risks are) but it's important to understand the impact of this upgrade.
I started a wiki page for this here http://www.mulesoft.org/documentation/display/MULECDEV/Spring+3.1+Upgrade
Eva did something very similar for CXF (this was quite a bit more detailed than you probably need though): http://www.mulesoft.org/documentation/display/MULECDEV/CXF+2.5.0+Upgrade