It's safe to say the one you posted above is NOT legit.
Odesk, however does appear to be legit:
Domain Name: ODESK.COM
Registrar: MARKMONITOR INC.
Whois Server: whois.markmonitor.com
Referral URL:
http://www.markmonitor.com Name Server: NS5.DNSMADEEASY.COM
Name Server: NS6.DNSMADEEASY.COM
Name Server: NS7.DNSMADEEASY.COM
Status: clientDeleteProhibited
Status: clientTransferProhibited
Status: clientUpdateProhibited
Updated Date: 28-jul-2009
Creation Date: 31-aug-2002
Expiration Date: 31-aug-2018
8 years old, registered long term.
However, legit simply means it's not a fake site. Sites can vary widely as far as quality goes, and even the top sites can contain scam offers, so you still want to be use caution with any online offer.