Neat tank, ive never seen one of those before. Its a good choice for mbuna though, with that corner they wont be able to see fish on the far side of the tank which is perfect for aggression.
Your yellow labs look pretty good, except one looks like its a hybrid - they are commonly called 'yellow yellows' and are mixed with zebras.
What you called an electric blue ahli does not really look like one... the face is similar but the markings look a little off... could be a copadichromis species This is what an 'electric blue' is supposed to look like (Sciaenochromis ahli's are pretty rare and what usually are called ahli's are really fryeri's).
http://www.malawimayhem.com/profile_show.php?id=80
Although the markings look a little similar to the ahli... but they are more rare so it would be odd for you to have one.
I'll try to get some help on the ID, but you may have to wait until it colors up more to get a more positive ID.
There are a coupld Peacocks (Aulonocara) that are called swallowtail:
http://www.malawimayhem.com/profile_show.php?id=534
http://www.malawimayhem.com/profile_show.php?id=573
Your tank is looking good and i'm sure they will love the lace rock when it comes in!
Watch what your feeding these fish as the two new ones you have are haplochromis and the yellow labs are mbuna, both of which require very different diets. Generally mbuna are vegetarian and haps can handle more protien, but in order to avoid 'malawi bloat' i highly reccommend you feed them lots of vegetable matter such as spiraluna and get a high quality cichlid flake or pellet such as NLS.

HTH
-Diana