Remember the Minnesota Budget Surplus? The state's bookkeepers made a splash in the news when they said they expected to rake in 2-point-3 BILLION dollars more in tax dollars over the next two years than they'd anticipated. The announcement set lawmakers at the state capitol to claim some of the money on their pet projects. Now, as the legislative session draws to a close, Minnesota Public Radio's Martin Kaste reports on what's happened to the budget surplus: ((sound of taxes conference negotiations)) The details of the state budget have yet to be finalized in negotiations like this one, where House and Senate negotiators are slogging through hundreds of pages of new tax statutes. But you can already make out the general trend, and that's higher spending. K-12 spending is going up te