CertExams.com released CCENT 100-105 practice exams (http://www.certexams.com/cisco/ccent/exam-details.htm).
The practice tests consist of 300+ questions with detailed answers. You may download the free version here:
http://www.certexams.com/download/ccent-simulator-download.html
The main differences between old and new objectives include questions on LLDP, RIPv2, etc.