Anti-virus software (like clamav) for Linux wasn't developed to fight viruses on Linux, it's for when you use a Linux machine as a front-end for e.g. incoming mail for Windows machines. Like e.g. at where I work, where there are some Windows machines here and there, and the mail servers run Linux.

Of course you could use your N800 as a front-end for your Windows machines department.. of nothing else it would be kind of .. impressive..!

BTW, re. the link above about clamav trouble: clamav is a great, free product and thus an easy target for patent trolls. If you can, please support Barracudanetworks in this.