AS Connectivity Lookup

How can I easily view the current peering relationship of a particular AS? Assume the AS you are researching does not have a looking glass and you are not going to do lookups from the top 10 providers route servers to get some glimpse of their connectivity. In my particular search bgplay.routeviews.org does not have any information and as-rank.caida.org is out of date. In the past there was a great website called webtrace.info but it is no longer online. Any suggestions?