If you're wondering what sort of things are coming in the next update, there's a discussion in the past few pages based on the incomplete testing versions. But yeah, if you're looking for how close it is to a proper release, Trinity3's already answered that where I wouldn't have been able to.
Incidentally, there seem to be three new monsters added to the test build since the last time it was discussed. Namely:
Though I haven't played the latest test build, so I don't know what they're like. (It's a >1GB file every time there's a minor update, so yeah.)
For the record, the other previously-mentioned monster types added in the update include: