Common disk format between 2.4.current linux and FreeBSD 5.3 and later

[secmgr]

I'm building a usb harddrive and i'll be using it under both linux and 
FreeBSD.  vfat is not a contender due to a 2gb limit of file size (I'm 
using it as a dump disk and I don't want to deal with multiple 
volumes).  It seems that BSD can talk to ext2 partitions and Linux can 
talk to the older UFS format.  Suggestions on which is the more stable 
implementation for a r/w environment?

I've read that there were issues in the past, but I could see anything 
within the last year or so.

Thanks
jim