HN Build This: iPad iPod Apps Data Syncing

My dad has a problem that I think many others will have also. He has bought an iPad after buying an iPod touch. His problem is, he has shopping lists data in some app on iPod touch but it won't get moved to his new iPad's same shopping list app.

He wants them to sync, or at least, if you've edited the same shopping list on both devices, take the newest version an sync time. I'm surprised Apple hasn't built this in; it sounds trivial enough that I think if I was an iPhone + Mac developer I'd be able to do this in an afternoon.

Since solving this problem will help many users I think this is an opportunity for someone/company to make some money. What do you think, will anyone be interested?