Came across these two charts on who to watch and who is in play. Each chart has a little different information, so worth it to check out both. You can sort on the columns to see how they voted in November on the House bill, how they are lining up for the next vote and more.
New York Times: Democrats to Watch on the Health Care Vote
The Washington Post: Who’s in play: House health-care vote
Not sure if these charts are being updated as the situation changes.