MyC4 differs in its approach from Kiva: At MyC4 lenders do earn interest on the loans. Currently interest rates of 20-24% are typical with loan terms of 6 or 12 month.
P2P-Banking.com joined the Beta as a MyC4 Builder. The gathered experiences are published in an exclusive P2P-Banking.com review of MyC4:
http://www.wiseclerk.com/myc4-p2p-banking-review.pdf (0,4 MB, 3 pages)