This was my first ever render I would consider complete. I completed it back in 2009, in the 2.49 days. Back then, believable glass was not an easy thing to achieve. Looking back, I'm very surprised I did as well as I did.
You'll notice the hard black shadow. This is because I didn't enable "Receive Transparent" on the ground plane. The glass material is actually emitting light, though back in those days, nothing could receive mesh light, so the only effect it had was making the glass brighter, which was what I wanted.
Basically, back then, I didn't know what I was doing.
I have since lost the file, but I'm working on another, this time leveraging cycles for a much better result.
Nice look!