i have HAXsync and it works nice to do what previous versions of android did with facebook integration
Google developed a custom sync api for Facebook. Later on Google created a standard contact sync api and deprecated the api they had created for Facebook. For whatever reason Facebook has refused to port to the new api. Probably some power play on both sides around Google+. This all happened around 2.3.3 time. Patches are available which re-enable the api.
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