Well the type of bubbling I use is kind of like those stick on bubbles for pictures. You've seen those right? They're little stickers. I make my bubble stickers in micrographix (a photoshop mutant) and just pop them onto my comic. Here's a quick tute of how I do it:
1.) First I make the "stickers" by using my masking option to make different bubble shapes with the pen and circle sizers. I look at that with the ruby overlay to make sure that it doesn't look too stupid.
2.) Next I use the stroke option to get my bubble border. This changes depending on what I plan to do with it later.
3.) Lastly I bucket fill the background around the bubble with a bright color like yellow or bright orange.
Using the Bubble Stickers:
All I do is negative mask the colored area and copy the bubble, then I paste it as a new layer on my comic. This means that i can move them around and all that. When I'm ready to letter, I just smooth my layers and set up a text box in each bubble. Handy as can be, though it does take longer than just drawing them in.
Hope this helps ya, for demonstrations on what the bubbles look like, just visit
http://kectug.keenspace.com. All of the newer comics on the page use 'em.
Oki ni
Bun

http://www.onehouraxis.com
There is no emotion; there is peace.
There is no ignorance; there is knowledge.
There is no passion; there is serenity.
There is no death; there is the Force.