Sony Ericsson Xperia Arc Custom ROM List
*Flash your device at your own risk*
(11/20/2011) [SS] SaOSiN-MIUI@ARC 1.11.18 Release:x09 (2.3.7)
(11/20/2011) [SS] arconium 2.0a (2.3.4)
(11/18/2011) [SS] Blend_MIUI@ARC 1.11.11 V09 (2.3.7)
(10/22/2011) [SS] SE.TWEAKED V0.7
*All source links are from xda-developers forum*