Also here's an article on Joseph Cao (LA-2), the only Republican to vote for the healthcare bill. More from Politico on party dissenters. Cao is very much not a dissenter in the mold of the so-called "tea-partyers" who have been making up the most interesting faction in the Republican party of late.
UPDATED: There was also some interesting Democratic dissent too from Dennis Kucinich and with the Stupak amendment.
Also Political Scientist Simon Jackman shows that Democrats voting against the healthcare bill in the House tended to represent districts where Obama received a lower vote share in the 2008 presidential election. The New York Times put together a useful interactive table on the 39 Democrats who opposed the bill. And of course, still more about the Democratic schism from Politico.