search for SQL and it will come back with a bunch of apps. i even bought a SQL 2008 book that i read on the train. and some of the free e-books that are PDF's i just added to iBooks.
one other thing i do is we have HP servers and i'm in the process of setting up iLO ports on them. with VPN and my iphone i can press the power button via the safari browser if need be instead of going to the data center at night.
with iOS 4 i have over 500 apps on my iphone now
i think new iPads will come out in early 2011 i might even get rid of my iphone and get a 3G iPad