Just discovered this forum, I have been hanging out on cactiguide.com for a couple of years, and recognise a few names, but its nice to have contact with a lot of local australian growers.
My grandma gave me a cactus years ago, and I never thought too much of it, until I got older (about 19), when I realised there was a lot of different types. I tried to grow some seed, and failed miserably, but have had more success since then. Now by plant numbers my collection is mostly seed grown, but the big ones are all purchased.
I thought I would share my collection with you:
http://www.flickr.com/photos/53081771@N08/sets/72157624727484700/