I've decided to take off the comments moderation feature - at least for the rest of the month, to see how it goes. So from now on, your comments should appear straight away.
The only reason I was moderating comments was to try to cut down on the amount of spam (quite a lot, as it goes). I should be able to delete the spam when it crops up, but it does mean that stuff I haven't approved may pop up from time to time - so apologies in advance.
Like I say - we'll see how it goes!
Thanks again for all your comments. Very much appreciated.