I too have the same issue. HP DV-7, vista home 64 bit, with a realtek gb card, intel agn100 wireless.
DIR-825 A1 with 1.12 NA newest firmware, installed shareport. The printer showed up as a device once I restarted the printer.
If my laptop is hooked up via lan cable to the router, I can click on "Connect" and the device goes from available to connected, with a green checkmark. Prints fine.
If I click disconnnect, unplug and go wireless, the device is still listed even after a refresh, but clicking on connect gives me the "connecting to....xxxxx..please wait" for about 20 seconds and the device remains at available, never connects.
Now, i just tried connecting from my XP Pro desktop in the other room that has a liksys usb antenna, and that connected NO PROBLEM.
so the issue is either a vista or wireless adapter setting, right?