Well, if you followed the llvm history you know what difficulties Jonas faces. It is definitely not abandoned and is already integrated in trunk.
The target is first geared to getting it working on macs and then scale to other platforms, as I understand it.
BTW there are alternative (complex) scenario's to use llvm by using some exotic toolchain: compile to Java --> Compile the java byte code to llvm -->compile the llvm code to binary.
It is even possible to use the new Javascript back-end and generate LLVM ir code from that! (Google)
This is not for the fainthearted, but it works. (Not for Lazarus, but for FPC)
And llvm is not the holy grail. You just have to be patient.