is there something wrong with thc.coinswim.com? i mined there all night and didn't get any thc.
guess hemppool is the only place to mine?
how are the results of solo mining?
Solo mining works well! For each 50kh/s that you have you should find 1 block every day. A 280x will find 15 blocks a day. It is a good chance to practice solo mining.
http://www.hemppool.org works the best. It is the official pool so even if it has overwhelming hash power, which it doesn't, there shouldn't be a huge problem.
http://thc.mine-coin.de/ << is what I use as my first --failover pool and then coinswim as the third.
You should look at the "Blocks" tab on every pool and check out there stats before you mine it. There is definitely something wrong with that pool if you didn't find a block throughout the night and you have a 280x card.