This article is from the Foo Fighters FAQ, by Ben Rogersbenson@unix3.netaxs.com with numerous contributions by others.
The songs may have multiple meanings, or none at all, so you
shouldn't look too much into them. Dave has given some of the
mystery away, though, in a few interviews, and in his introductions
of the songs at concerts.
*This Is A Call: Dave thanking and paying respects to everyone
he's ever been close to.
*I'll Stick Around: A song about feeling like you're lost, but
you're not going to quit.
*Big Me: A song Dave wrote for his ex-wife.
*Floaty: Dave told an interviewer that he once had a dream that
aliens had come to the earth, and a new age of man was
beginning. It inspired one of the songs on the album.
While he didn't say which one, he did say that the
lyrics were very spacey and general. He could be
talking about "Floaty". (Then again... maybe not.)
*Up In Arms: Right before they played this song on the MTV special,
Dave mentioned that [probably paraphrased]
"That's a cute little love song about my wife."