Welcome Natalie
I too have recently caved and bought myself a dob scope. Speaking as one who's just taken the plunge, I might be so bold as to suggest a few additional worthwhile items;
1. The Backyard Astronomer's Guide (MUST be 3rd edition).
This book covers pretty much EVERY part of practical amateur astronomy.
It covers everything from buying your first scope (what to do, and what not to do), explains how eyepieces work (and what's good and what's not), has a raft of chapters on astrophotography and how to get started. It also covers what to observe, and how to observe.
It even covers things like collimation very well (something you'll have to do with a newtonian). Speaking as someone who'd only ever read about collimation (in that book) before I bought my first scope, I have to say that once you do it the first time, it becomes very easy to understand how to do it in future.
I got mine thru amazon, and with the way the au dollar is going at the moment, it's worth snapping up.
2. Cheshire eyepiece for collimation. There are other options (lasers etc), but a cheshire eyepiece is simple, and it works.
3. as a first eyepiece upgrade, I personally recommend a 24mm (or similar size, depending on the focal length of the scope you end up buying) Panoptic from Televue. The reasons for this can be outlined in this thread:
http://www.iceinspace.com.au/forum/s...ad.php?t=74009
A lot of people have their favorite eyepieces, and it's true that you will eventually need to get different eyepieces for different jobs (in the same way that you have different scopes for different jobs), but I've not yet heard a bad word about this particular eyepiece, and I'm convinced that you'll get an awful lot of mileage out of it. It's a winner.