I've been solo mining with NVidia GPUs for the last two weeks with 18 Mhash/s. Found 16 blocks in 14 days. Very similar amount of coin mined as being on a pool, just a personal choice to solo. My reward/electricity ratio has hit parity, but it still seems a little better than other coins. I had been selling as I mined it, but now--because of the difficulty of getting ever smaller blocks--I have been hanging on to new mined coins for the last several days. I have a feeling that it might get more difficult to mine if it gets listed at the "where to mine" sites.

This is not an endorsement or anything, but I figure I should mention that this dev has carried through on the bounties with me, such as the logo design, even though they upgraded to other designs. I like them for their continued support and their fast, efficient algo, so I've been sticking with JPC for some time now.