I have.

I also have mined some coins there.

And made a guide about how you can do it too:

If you have an FPGA miner, you can follow this guide:

Solo mine testnet bitcoins with cgminer, Bitcoin Core, and a Compac F

If you don't have an FPGA miner, check this one out:

Solo mine testnet bitcoins with bfgminer, Bitcoin Core, and a CPU/GPU