I have been on this for just over a month. I have had some nausea from and some fatigue, but it isn't bad. At the one month mark I had a CT to check for any possible lung damage (that is a possible side effect). No growth, but it was just a month. The more definative CT will be next month. If there is no growth, or shrinkage, I will continue.
The other drug you mention is Belinostat. I haven't heard or read that it is anymore effective or not. Both AZD0530 and Belinostate were given Phase II status because there had been previous Phase I trials for solid tumors that included Thymoma patients that had positive results. There is no indication that the results were statistically relavant or not
Also keep in mind that you don't have to confine yourself to trials specifically for Thymoma. You can get into some Phase I trials for "solid tumors". i was on one of those for 18 months starting in 2006. There was an initial 20% shrinkage and then no growth for 15 months. It was a Pfizer study with monoclonal anti-bodies IGFR-I receptor. I understand that Mayo Clinic and IUPUI are currently negotiating with Pfizer for a Phase II trial specifically for Thymoma, but Pfizer does not want to finance the study.
There are also some other interesting Phas I trials that might come online soon. One uses IGFR-I Monoclonal Antibodies in combination with other drugs like Cisplatin and Paclitaxel and another that uses some new molecular encapsulation of standard drugs that delivers the drugs only to targetted cancer cells with particular chemical receptors reducing or eliminating side effects allowing for higher doses or longer treatment of resistent tumors.