The IOUs can be redeemed at face value, plus 3.75% interest, by Oct. 2 or earlier if a budget deal is signed and the state has enough cash to cover them. Some banks and at least 25 credit unions have agreed to accept the IOUs. Bank of America, Chase, Citi and Wells Fargo have said they would accept the paper through July 10.

In other words, you can treat the IOUs more or less like an actual dollar payment — the banks will accept them, and California will eventually pay them back (or default on the rest of its debt).

This is expensive and inconvenient to the average taxpayer. Instead of borrowing a few billion dollars at a time from people who want to lend money, the state is borrowing a few hundred dollars at a time from people who want cash. The IOU trick gives them some breathing room, though, and presents the possibility that California can coast into an economic recovery without gong bankrupt first.

California Warrants Blog Post Roundup

• Joe Weisenthal at Clusterstock agrees that California has invented its own currency.

• Kay Bell of Don’t Mess With Taxes tells taxpayers what to do, with specific advice on everything from how to deposit them to what to do if you can’t.

• BuyMyIOU.com is exactly what it sounds like. (But caveat emptor — the site doesn’t exactly look professional.)

• Months ago, Taxrascal suggested that state IOUs aren’t so bad. Perhaps California’s treasurer read it!