Wisconsin: "fake" primaries to cost over $400,000 ;Some more on Wisconsin
Arizona: Pearce recall nearing approval
New Jersey: good history of the state's recall provisions
Texas: Court may be forced to call recall if Council won't
Not directly recall related, but here's my article in Politico on Rep. Weiner's predicament. It is focused on the difference between federal and state law in forcing someone out of office.