Yes, the Rock Band makers at Harmonix just keep on keepin' on with the dowloadable content.  And No, this wasn't an announcement that the Momma's and the Poppas or the Bee Gees would be joining Rock Band's music chronicles.  This week the Rock Band forums reveal this weeks upcoming DLC hits.

"Action" made famous by Sweet (cover)
"Last Train to Clarksville" made famous by the Monkees (cover)
"All the Small Things" by Blink 182

With so many songs out since Rock Band's release, it makes you feel bad for Red Octane and Guitar Hero III.  Those guys must really be asleep at the switch.