It's a fairly big story, so it's worth repeating it from Trainnes. Let's hope Congress and the next President don't mess this up too much - it's going to take more than a year or 2. Siemens will be a busy place in Sacramento.

[runwaygirlnetwork.com]

tl;dr: Amtrak signed with Siemens to essentially re-equip the entire non-Superliner, non-state-owned system. New cars in Phase 1 to replace remaining Talgos on the Cascades. Phase 2 gets enough new cars to completely replace Amfleet 1 equipment, and new dual-mode diesel-electric locomotives to replace nearly all locomotives currently operating in and around the NE Corridor (replacing all but a few of the Sprinter electrics they bought only a few years ago). Phase 3 gets new diesel-battery hybrid locomotives to replace old dual-mode (3rd rail) locomotives on Empire Service trains. Funny that they're using the same hybrid consist scheme that Wabco recently demonstrated, not actual hybrid locomotive units; battery units mainly for access to Penn Station. The passenger cars described seem similar to the ones being supplied to CA and IL.

The Reuters article also linked in Trainnews was much smaller and less informative than the avgeek article.