FYI, is anyone is interested....here is what I got back from HTC regarding this issue....
nice to see them state that 2.1 IS coming soon

"Hello Greg,
Thank you for your inquiry regarding the issues you are experiencing with the bookmarks on your Verizon Wireless Droid Eris. I can understand how important it is to have your device it is to be working correctly.
If your bookmarks are deleting after some time, this could be a glitch caused by the HTC widget for Bookmarks. However, I am unsure of this, I would like to have you add your bookmarks back, but do not add the widget it back. You can still access your bookmarks by opening the Browser and then selecting Menu > Bookmarks
. I would also like to inform you that before the end of the first quarter of this year, Verizon Wireless will be releasing a Android 2.1 update, which will contain an updated version of HTC Sense UI. So some of these minor glitches may be resolved with this update. "