I found this little beauty on sale at Best Buy this weekend for a ridiculously low $120. That beats the snot of of the iPad on price. It doesn't have a ton of storage, only 4GB, but with an SD card slot, I can add storage as I need it. It also has 802.11 b/g WiFi, and up to 10 hours of battery usage time. Plus, it's running Android, so I can get all kind of custom apps for it. It's not an iPad, but it's good starting device, I think, and with the built in ereader capabilites, and that fact that I can get Kindle and Nook for Android, it may be a pretty good little tool.
The nice thing is, since it's a tablet device, once I do get an iPad, I can give it to my son who'll probably turn it into some kind of brain for some robot he's designing... either that or he'll watch YouTube on it.