More students are marching to unseat Prime Minister Samak, adding to an ideologically mixed coalition of businesspeople, royalists, and academics.
Activists have disrupted air and rail travel, and refuse to leave government grounds.
Former Prime Minister Thaksin Shinawatra, facing corruption charges, fled to England this week. His absence may hurt the pro-Thaksin ruling party but also ease political strife.
Veteran climbers say the mountaineers were highly experienced, but point out several factors that contributed to the tragedy in which 11 died.
About $1 billion is needed over three years, according to a new assessment. But the junta's lack of reform is raising doubts about long-term assistance.
Each side has domestic reasons to prolong the conflict.