Well, the thread in AIBU looked like it was threatening to enter the realms of 'heated debate', but seems to have calmed down. Though general consensus is I should just give M the chocolate button rather than trying to melt it into the porridge!
For avocado, once it's pretty ripe I just mash/puree it with a bit of cooled/boiled water at the moment, Memphis. :) M had it for lunch today and managed to smear it everywhere. Next week though I plan to try offering some mashed with soft cheese, to see what she makes of that.
For cameras, I use a Canon Powershot A630, which is pretty good. I lovelovelove the fact I can angle the screen, it means I can take pictures from weird angles really easily. Or, M loves seeing herself in the screen so I can get her to smile at herself by flipping it to face the front!
However the camera struggles in low light conditions. It has a red eye light, but when it activates M tends to stare at it in vacant-eyed fascination, giving lots of zombie-baby pics. 
Sounds like there's teeth starting to pop through all over the place.
M is chewing on everything in sight, but no immediate evidence of teeth yet.
A new query... How are all the LO's doing regarding hair?
M lost virtually all the hair she was born with (which was a shame, as I quite liked her hairy werewolf ears!) and now has a dusting of brown hair everywhere aside from the little patches at the back where her head must rub on the (infant/cot safe) pillow. I assume those will fill in over time..? 
M is scratching her head a lot, she did have some dry patches of cradle cap but they've mostly gone now. Is it likely to just be itchy because the hair is growing, does anyone know?