Yes, it should come in handy when cross-compiling is too difficult. You can also just copy many utility programs from there to the PB (same as for many programs in LoneTech's Debian squeeze/sid image). In the default qemu mode, the host OS is at IP address 10.0.2.2, so you can scp files to and fro inside the guest using that address. That's how I got the ghostscript sources onto the image, and copied off the binary files afterwards. The build process is slow under emulation, but dependable.
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