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Looks like ext4 might be better than ext2 for SSDs...
http://thunk.org/tytso/blog/category/computers/ssd/

Just need to set that noatime and no journal options...

Other reading... http://en.gentoo-wiki.com/wiki/Solid_State_Disk

  Changing defaults... changed huge_file to large if you don't need 2TB files/devices
  Also removed has_journal
/etc/mke2fs.conf
 ext4 = {
                features = extents,large_file,flex_bg,uninit_bg,dir_nlink,extra_isize
                inode_size = 256
        }

  just to make sure that no journal is used...
mke2fs -t ext4 -O ^has_journal /dev/hda1

  might be required (mount may not autodetect ext4)
mount -t ext4 /dev/hda1 /mnt/gentoo

Also note that the huge_file/large_file option affects the kernel... (block layer-> support for large (2TB+) block devices and files