Now php-5.3.3-r3/5.2.14-r2 is in tree, pecl-memcached is no more compatible and blocks last php version. It needs to be ported. Follow patch and complete ebuild
Created attachment 252783 [details, diff] pecl-memcached-slot.patch Patch against 1.0.2 ebuild
Created attachment 252785 [details] pecl-memcached-1.0.2-r1.ebuild Complete ebuild ported to the new pecl eclass that support php slotting
Fixed in tree, thanks : http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/dev-php5/pecl-memcached/pecl-memcached-1.0.2-r1.ebuild?view=markup