It looks like active development on the project ended 4 or 5 years ago.
Has a similar project come along, on which people are now working?

Why do you think that?The latest snapshot page is here: http://www.linuxfromscratch.org/lfs/...s/development/ and the dates on these files are from today.

So again, why do you think that LFS has not been developed for a few years when a simple look at the website says very differently.

According to the LFS website:

LFS 6.4 Release
Bruce Dubbs - 2008/11/23

Looks like 4 or 5 months, not years, ago. All of the ()LFS projects are going strong.

Because the ALFS files here are old, and there is no deaadline set on the roadmap here, and the documentation here ended years ago and because I visited a lfs forum and it seemed to have ground to a halt.

Well, LFS still keeps going, but I think it has one problem, little innovation.

With LFS 7 they finally want to provide a 64-bit version, which is great (btw. there already is a 64-bit LFS Live-CD which can be used to build a 64-bit LFS).
But that's pretty much it, aside from the perpetual upgrading of packages to the latest version.

A distro based on LFS which is under active, but slow development is my EasyLFS. The latest version (0.4) is getting a bit old (it's been over a year I think) but the version I'm working on right now (as said, it's progressing slowly, mainly because I work on it by myself and test-compiles test a couple of hours) will have a lot of improvements over 0.4.
With EasyLFS I don't simply follow the LFS-book, over time quite a few differences have come together, and I also offer some more stuff than LFS, including some advanced stuff like SELinux.

CLFS has provided 64-bit instructions for years.

Yes, I'm looking into CLFS from time to time for info. But personally I find it quite complicated going through this extra work with the cross-compiler-chain.
Also I somehow find the regular LFS-book more readable than CLFS.