David Einhorn's Greenlight Capital established new positions in Computer Sciences (CSCO) and Expedia (EXPE) in Q1. Assuming Einhorn maintained his position through April 27, the Expedia bet was a smart one. Einhorn also liquidated his positions in TRV,, FSLR, OVTI, and YHOO, and significantly cut his positions in MSFT, GM, and RIMM. EXPE +0.9% AH. (13-F)