If you installed one of the Froyo updates direct from Google, then you will continue to receive future updates. If you unlocked your phone and installed a modi

If you installed one of the Froyo updates direct from Google, then you will continue to receive future updates. If you unlocked your phone and installed a modified or custom image from another source, then that image probably has OTA updating disabled and you will need to apply updates yourself. If you flash back to a stock image from Google, then I believe you will start receiving OTA updates again.