I am trying the free tier right now. I installed https://github.com/cbuchner1/cpuminer. I have got it running, but I don't think its doing much of anything.

Here's a tail of the log:

[2013-11-29 08:15:37] Stratum detected new block [2013-11-29 08:15:37] thread 0: 83388 hashes, 0.73 khash/s [2013-11-29 08:16:32] thread 0: 44064 hashes, 0.79 khash/s [2013-11-29 08:17:55] thread 0: 47700 hashes, 0.58 khash/s [2013-11-29 08:18:14] thread 0: 34596 hashes, 1.79 khash/s [2013-11-29 08:19:38] Stratum detected new block [2013-11-29 08:19:38] thread 0: 65016 hashes, 0.78 khash/s [2013-11-29 08:20:38] Stratum detected new block [2013-11-29 08:20:38] thread 0: 26352 hashes, 0.44 khash/s [2013-11-29 08:20:50] thread 0: 26364 hashes, 2.24 khash/s [2013-11-29 08:23:40] thread 0: 134484 hashes, 0.79 khash/s [2013-11-29 08:23:51] thread 0: 47280 hashes, 4.48 khash/s

That's for litecoin and bitcoin. I would assume primecoin would be better for cpu mining because it hasn't been optimized for gpus yet.

May be so. I have very little understanding of any of this. What I am doing right now certainly isn't worth even this tiny bit of effort that I have put into so far. My Account Balance is 0.00016236 LTC after 9 hours.