I doubt it, the problem with mirroring is keeping the content in sync, with a static site this is not too difficult, with a data driven site you need to look at database replication, potentially in real time. You also need to consider how you will handle session data as potentially page 1 could be read from server A, then post data back which will get handled by server B. Lots to think about even if you're mirroring on the same subnet, mirroring over 2 or more datacenters is even more fun