As you probably already know, Radiohead finally officially announced their two summer shows at the Hollywood Bowl. The shows will take place Sunday August 24th and Monday August 25th. Liars will open both shows. Unfortunately, you already missed the presale on Radiohead's website, but they weren't giving seat assignments yet anyway (so it was a leap of faith). KROQ and Hewitt/Silva have a presale starting Friday at 10:00 AM (you'll need the password). Otherwise, you can wait until Saturday at 10:00 AM. Tickets are $39-75. You can road trip to San Diego for a show on Wednesday and Santa Barbara on Thursday.
I've seen Radiohead several times (1998 at Universal, 2003 at the Hollywood Bowl and 2004 at Coachella) and they put on a fantastic show. They played the Whiskey, Troubadour, Palace and Wiltern back in the day before I lived here.