It’s out there — but not where you might expect.
You can find the current version at the Heritage Foundation’s website here. It was subsequently posted here on the National Review’s website. (If you prefer html, Truth Laid Bear has a version here). But, as of Monday, May 21 at 5:00 p.m., the current text was not available on official government websites like GPOAccess.gov, or Thomas even while the measure was being debated on the floor of the Senate.
Here is the link to the latest CRS Report regarding the Immigration Bill: http://fpc.state.gov/documents/organization/84920.pdf
Another website of interest is provided by Georgetown University at http://www.ll.georgetown.edu/guides/ImmigrationLegislation110th.cfm