The two groups subbing GITS:SAC, Ani-Kraze and AonE, have stopped releasing episodes at the publisher's request. AK stopped at 19, AonE stopped at 22. Now we have to wait for Bandai to release the subbed DVD's and we'll get some DVDrips to finish the series (that or some fansubbers with less scruples).
Remember, patience is a virtue, and I'm sure there are more then enough animes out there that you haven't seen yet. Maybe try a different genre, just out of curiousity?