Sharing /usr/ports between AMD64 and I386 ok?

[Francisco Reyes]

Is /usr/ports the same for AM64 and I386?

Basically I am moving towards having /usr/ports on a single machine and 
have all my other FreeBSD machines mount it using NFS. 

At home I have 3 I386 FreeBSD machines and one AMD64. If possible I would 
like all 4 to share /usr/ports... specially since 2 of the I386 are only 
partially in FreeBSD (ie test/backup machines with other OSs installed).