Several of these updates are found in a (surprisingly) rich LA Times article here: http://www.latimes.com/news/nationworld/nation/la-na-assess18may18,0,723589.story?coll=la-home-center
Chuck Grassley is "against" based on clear statement here: http://grassley.senate.gov/index.cfm?FuseAction=PressReleases.Detail&PressRelease_id=5388
Craig Thomas is "against" and says the immigration deal was "badly bungled" and "gives far too much blanket amnesty." Here: http://thomas.senate.gov/index.cfm?FuseAction=PressReleases.Detail&PressRelease_id=788&Type=Press%20Release
We are putting David Dreier (R-CA) in "against" because he writes: "I am strongly opposed to any plan that grants amnesty, which is why I voted no on the Immigration Reform and Control Act of 1986. I will not support any legislation that grants amnesty." There seems to be some "wiggle room" there, but we'll take him at his word for now.
Elton Gallegly, (R-CA) is a firm "againts" with calling this bill "amnesty, amnesty and amnesty."
George Radanovich, (R-CA) appears to be a "for" with this description in LA Times: "Rep. George P. Radanovich (R-Mariposa), who has pushed for a guest worker program that would benefit his agricultural-rich district, predicted the measure would pass." (link in spreadsheet)
Rep. Ray LaHood (R-Ill.) is described as a "for" in the same LA Times article.
Jeff Flake (R-AZ) is quoted in the LA Times and another source predicting a good chance of passage, which suggests to me he is a "for."
We're putting Heath Shuler (D-N.C.)as an "Undecided" because of this loophole-rich quote by his spokesman: "I can tell you that if it has anything resembling amnesty, it's going to be a no-go for the congressman," said Andrew Whalen.
We'll throw Jim Marshall (D-GA) in "against" with this spokesperson line: Douglas Moore, a spokesman for Marshall, said, "We are not in favor of any kind of amnesty for illegal immigrants."
Ed Royce (R-CA) is "against." His quote: "This is wrong for the U.S. economy."
Dana Rohrbacher (R-CA) is "against," saying this "will make a bad situation worse."
Loretta Sanchez (D-CA) is probably "for," saying "The bill has right elements of security, and solving the problem of those already here and those who want to come here to work."
Nancy Pelosi, (D-CA) is in "undecided," stating: "While the bipartisan Senate agreement starts the process, I have serious concerns about some elements of this proposal -- the bill must be improved in the Senate," she said.
Note: These "we oppose amnesty" lines leave room for interpretation. Even proponents of this bill say that same line -- they just state that this bill isn't amnesty. So press your representatives to specifically oppose this bill rather than taking that line as a sure-thing.
You can see the full spreadsheet here: