I picked up one from ebay (http://www.ebay.com.au/itm/190868226501?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649) for my N4 and it works a treat. It is on my desk at work and I know that after using the phone a bit during the day, I just drop it on the pad and let it charge. Charge rate is reasonable - not as quick as mains charging but much quicker than USB.
Does Orange block tethering? Some US carriers do. I spent last week on holiday accessing the net on my 7 tethered to my 4 (wifi tethering) so it does work. Have you reset all your wifi settings (told the 7 to forget your network)? Also, try taking all the encryption off - I wouldn't recommend leaving it that way but it is worth doing for testing.
Not for me. It worked in JR15 and it still works in JR16.
In fact the ROM is flying now since I cleared 5GB worth of 'blobs' in the Clockworkmod folder. Turns out deleting the backup still leaves stuff behind which eventually fills the drive up!
I have had issues with hotspot in the past on different ROMs so I keep Barnacle WiFi Tether handy. I bought the widget too because it is pretty cool (and I'm all for rewarding the dev). I haven't had to use it in a while but it is definitely easy to set up and with the widget, it has one-click activation / de-activation too.
Podkicker works for me. I have several audio and video feeds and it updates / downloads on open. It also saves my feeds into an OPML file onto the SD card, so I never have to worry about backing up when flashing new ROMs, as I seem to do all too frequently :P