They have said they are making a second game, but it might not be for some time as they are wanting to wait until there a demand from people wanting it then they will bring it out - its somewhere on www.joystiq.com about the end of June there is a small message about it.
IMDB does have the voice actor of Alta´r - Philip Shahbaz - as linked with the second game, listed as a 2008 project but i doubt we would see anything until 2009, with a few big releases already due, they will likely wait until there is a gap to take advantage for.
I think with the new Prince of Persia coming out this year, which is using the Assassins Creed engine, they will wait to see how that is rated first.
heeeeeelp !!!! i succeded in defeating everything that stands in my way....i've beaten Al Mualim when he divides himself into 9 of him (i think) and then another time, but now he's up on the balcony and i don't know how to reach him....what do i do?! pls respond a.s.a.p.