Try a Restart of your Mac...
For the iPad...
Close All Open Apps... Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
More Info here on iPad Charging > http://support.apple.com/kb/HT4060
Cheers for that.
Sadly, no change. The 'charge' sign came up once plugged in, for about a second, before disapearing and displaying the 'not charging' text next to the battery.
Grrr... Down to 43% and I dont have my ipad charger with me (almost in tears - not really, just being dramatic) I may have to get an actual note pad and pen out!
There might be something in these links to try.
USB and FireWire Quick Assist
Common fixes for USB device issues (unrecognized, etc.)