Also, on the off-chance you might want to take a look at it yourself, in case it's something you can figure out better than the repair people (yes, that does happen!), here is a list of appliance repair links that have been helpful to me over the years:

www.applianceaid.com
www.appliance411.com
http://applianceguru.com/
http://fixitnow.com/
http://www.partselect.com/dishwasher+dishwasher-wont-work+re...
http://www.american-appliance.com/catalog/newsdesk_index.php... (a series of tips, also sell parts)
http://www.doityourself.com/
http://www.expertcentral.com/
http://www.diynetwork.com/search/results.do?diySearchString=...
(has a video on dishwasher installs here too)
www.repairclinic.com
http://www.searspartsdirect.com/partsdirect/index.action (parts)

This time, it didn't blink any error codes! But it still leaves about an inch of water in the bottom.

This might sound silly and obvious, but did you check that the internal filter/drainage area is clean & unclogged? Pull it out and check that the drain hose is clear? I had someone give away an older dishwasher once as "broken" when all it had was a dirty, partially clogged drain line.

HTH,

Laura