I have downloaded a few of those fonts from Blambot and every one has been a winner!
I'll just throw this out there as an aid to other amateurs looking for a relatively quick and cheap way of getting their own style of lettering as a usable font. The kerning is a bit off here and there - but I managed to make what I think is a passable hand-lettered style font.
http://www.yourfonts.com/It's really simple - download the template - fill it in - upload it - test it and then pay the $9.95 via paypal to download your font. The font is a truetype .ttf file useable on both mac and pc.
What I did was to open up the template in illustrator and created my letters by dragging nodes around. That way you can play around a bit with the letter forms rather than having to be spot on with every letter by hand. I then exported a high-res file to use as my uploaded template. The test facility is your friend, I uploaded about four or five templates until I was happy enough and eventually paid for the download. You also get e-mailed the font-file as a back-up.
Here is the final font just to give some idea of what you get for your money:
I used both cases with variants for all the letters so I could substitute those all important san-serif i's and double o's where necessary.
Also, here's a
link to "The Praying Mantis", a crappy one-panel gag I did as a quick test.
I also invested in a bold version a couple of weeks ago. A word of caution about this service though, this is by no means the best way to make a font. The major advantage however is the cost compared to a proper font generation package.
For quality's sake, it's probably safest to stick to one of the free fonts from Blambot, unless you specifically and desperately need your own lettering in the speech bubbles.
The only other thing I have to say about lettering is never, ever use Comic Sans (for anything).