You could burn and boot Ubuntu Linux, that would give you instant-access to your data. After having booted, select Places then Home. In the window that opens, select ".. GB Filesystem" on the left side. Now you should see your data.
If you had a ICH9R chip now and your new motherboard has ICH10R, then it would just work and boot your array just fine - provided Windows doesn't BSOD because your motherboard changed; that still happens sometimes afaik. But at least your RAID would be fine.