I have been informed that the updater is back up and, looking in the downloaded .zip file I see that the ® and ™ symbols have been removed from the file name.
According to their site, you don’t need to download this update and install it in order to install the update to the Palm Treo 700w itself if you already have done so successfully. As posted on their site,
Note: This update has not been modified from the one posted earlier on the Palm.com web site. This download includes changes that affect the installation process only. If you have already run the Treo 700w Updater 1.10 successfully, you do not need this update.