.deb files arch independant?

[Eric Scott <scottclansman@cwazy.co.uk>]

Heya!  As I write I'm installeing Woody (Link to Sarge wasn't working... 
wasn't dead... just stalled, so I did woody for now) on my ol' PowerMac 
7300 next to me.  A while back I downloaded all 14 disks of Sarge for 
x86.  With my one-disk Debian 3.0r3 PPC disk I'm installing the base 
system on my Mac. 
What I want to know is if I can plug in the x86 disks and install 
software from them, so I don't have to spend all day downloading stuff 
for the Mac.  So: Are .deb packages arch independant?  I gather so, just 
want to make sure (Debian newbie here).  And... would it really mess 
things up if I used the Sarge x86 disks as apt-get sources on my Woody 
PPC system?
         Thanx in advance, and please CC this to me, I'm more likely to 
see it that way,
                 SigmaChi

--
Registered Linux user #: 366,862
Registered Linux computer #: 261,856