without a intervalvometer for your DSLR you can take 30second exposures. it's also good to put a 10 second countdown on to stop vibrations occurring when taking the picture - otherwise the first pic will be blurry. you can make it take (i think up to 10 photos in a row). you would want to up the iso to ~1600 -3200 (max) for a 30 second exposure. take as many as you can of the object. after some time there will be some field rotation around the edges but you can just be rid of that later on when you process them in DSS. also it is worth taking 'dark frames' keep the same settings and get 10-20 pics with the lens cap on, you use them in DSS too.
for planetary 'photos' people generally take videos for 1-2 minutes and use Registax 6 to align the frames and stack.
when i was taking photos with my goto dob i went for around 20 second exposures @ iso 3200.
you can see them here
http://www.flickr.com/photos/80336656@N07
best of luck!
Rusty