[Dovecot] Dovecot-lda, sieve and virtual users

At the moment I use a script to sort spam etc for virtual users into appropriate folders. I would like to be able to replace this with a per-user sieve script so users can customise their filtering through Imp web-mail.

The wiki says that per-user Sieve code should be stored in the users home directories - are there any plans to provide sieve script support for virtual users?

Thanks in advance,

David