The names says it all. Launched today, MediaOnTwitter claims to be "the first shareable media database available to Twitter users." According to a press release, the tool is now "supercharged by the support of TrackVia and supported by HARO founder, Peter Shankman." As PRNewser first reported in January, paid service Cision has added Twitter handles to their database as well.

PRNewser asked Shankman how he will be involved with the site, to which he replied, "I get about 200 journalists a day using HARO - [I] will work with them in the auto-confirm-reply to their queries to ask them to submit their twitter name if they have one to the list."

Not everyone is impressed with the offering. Said mediabistro.com Community Manager Seamus Condron, "I'm all for a decent Twitter directory, but MediaOnTwitter is an ungodly mess. No search and a user experience nightmare." Condron certainly has a point, but given the service is free, we think people are willing to cope - for now, at least.