While eBay is having this issue, make sure that when your listing says "Posting..." that you wait until you see a "Did Not Post in Time" error before you try to post it again.
We are working to get the item posted as long as it says it is posting. Your best bet is to schedule your listings and if any of them do not post within the alloted time, repost using scheduling.
We will let you know if we get any further information from eBay. Make sure to look in the NEWS section on this forum for site updates.
Thanks - Cara