Still unable to upload Ebid items using Googlebase's Bulk Upload file, (need the XML file from Ebid) but it's still possible to post up to 10 items at a time to Googlebase. The items show for 30 days on Googlebase, so it's worth trying out.
My item appeared immediately on Googlebase.
See this listing as an example:
http://www.google.com/base/a/2315926...60141632233489
Only mistake I made was listing my item on Googlebase US rather than Googlebase UK which meant that I had to convert to US$.
The listing doesn't link directly to your Ebid store listing, but you can put your Ebid store url into the listing.