[babul]

Also in that amount of time, technology will have changed significantly brining new issues (e.g. the need mentioned to make it look "web 2.0") and opportunities (for them and for others).

Even without knowing the details and complexity of solution, I dare say unless the value is in core algorithm/architecture design that can be migrated, much of what they have done will be outdated (based on assumption the technology-stack/tools/learning/knowledge they use is now getting outdated).