The Z310 is a budget clamshell handset available in Jet Black and Lush Pink color schemes. You can get it for free after a 2-year contract with AT&T.
The second one is a more interesting phone.
The W580 Walkman is a quad-band GSM music slider available in white, grey and black colors.
The handset comes with blinking multicolored LEDs on its two sides. Other cool features include Walkman 3 media player, ShakeMe feature, which allows changing tracks by shaking the phone, integrated FM radio, Track ID functionality, and built-in pedometer and fitness application for active customers.
The Sony Ericsson W580 is available from AT&T for $80 with a 2-year service agreement and a mail-in rebate.