Here's a couple of icons I made with the HL2 logo

[-T2-]

One of these is in normal 32x32 size, the other is 16x16 for your Quick Link bar or Links in Internet Explorer (yeah, I like to have custom icons for my Links bar ).

 

[LoneDeranger]

where?

 

[-T2-]

Errr...

Here's the actual file

Edit: I forgot to close WinZip 1st, so apparently the file wouldn't upload. Or something.