Bin-it!

Head over to mactrash.com and have a look at Bin-it.

It's a cute, little utility that suppliments the OS X trash-can with a few more features.

One thing that's annoyed me about the OS X trash can is that it only has two states. Empty and Full. Even on a 400+ GB hard drive, a 2k file in the trash will show it as full.

Bin-it offers you the ability to have a more analogue-style trash can, that has a level indicator, indicating various states in between totally full and totally empty. 

Give it a whirl and see what you think...

Disclaimer - I did some graphics for this program, so I've got a vested interest in spreading the word =)