Ebay is in denial about this being an issue, and they believe that their automatic bidding feature solves the problem. Clearly they are wrong, as indicated by the proliferation of services like this, and the fact that people like me have been frustrated by having been sniped on numerous occasions.
The solution I would like to see adopted is that auction closing times are extended by say 5 minutes whenever a last minute bid arrives. Until something like this is put into practice, the savvy bidder is wise to use a sniping service.
Adventures in Computing / tom@mmto.org