My understanding is that they only push it for so long. If you haven't gotten it yet, you will need to either use the URL link which has been posted or use the RUU version to update.
In the case of the URL, you should make sure you backup your data first and do hardware reset after you are done. The RUU will do wipe your data for you. Many have had issues with Froyo after doing just the update without wiping their data.