I know people hate it when we do this, but I'm going to link you to the big book of resources:
http://www.createblog.com/forums/index.php?showtopic=14636Maybe you won't find your brushes there, but you'll get a GIANT list of brushes and by the time you download all the amazing ones you come across you won't feel like you need a certain brush to make something good.
However, if you want those brushes, why don't you PM the people who made the images? Just be like "Hey, I really like your signature, would you mind telling me where you got that brush?" Most people would be flattered and more than willing to tell you.
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And the glow:
- Make sure the object has transparency all the way around it. (erase the stuff around the edges and it needs to be in its own layer)
- Layer > Layer Style > Outer Glow
- Choose whatever color you want. Move the box so you can see the preview on the picture.
- Mess with the "mode" (the drop down box that says screen by default) until you get the right color.
- With Contour, click the arrow and change it until you get the glow that's spaced out from the object.