Blogging Blue picked it up from the Recall Wirch Facebook page and later in the day the same announcement came to the Siren thru the Teabilly network.
His name is Jonathan Seitz, he is an attorney who practices in Illinois (rather than Wisconsin). He has no history of political contributions and it seems he had some tax problems with the state back in 2003.
Judging from comments on their page, it doesn't seem like anyone knows a thing about him either. His press conference will be held on Wednesday.
Yawn, sorry it's a slow Monday.