Yes, after two solid days of wading through the conversion and publishing process, I finally managed to slap my comic up on Amazon. And let me tell you, I had to have made about 6 .mobi files and changed my book info about a jillion times along the way. The Amazon folk (or more probably, the Amazon robots) must hate me by now.
That link again: http://www.amazon.com/dp/B00K1WBM3Q
Incidentally, I think my next post might be “everything I did wrong when I tried to make a digital comic file.”
In the meantime, I’m waiting on my comic to (fingers crossed!!) be accepted for Comixology. In any case I shouldn’t have any trouble getting it into IndyPlanet. Both of these offer digital comic publishing (kindle or otherwise) and IndyPlanet additionally has the option of purchasing the actual paper comic.
My digital comic is 42 pages (the back cover appears as a page), $2.99 USD no matter what site you get it from.
My paper comic is 44 pages, $5.99 USD (it includes 3 extra pin-ups you can cut out!) I’ll update when it hits Comixology and IndyPlanet!
[Edit: Available on IndyPlanet here: http://www.indyplanet.com/front/?product=109508%5D
[Final Edit: Available on comiXology here: http://cmxl.gy/1jREVom%5D
I posted wips of this comic before, here’s a couple of pages to give you a taste of the finished product. It’s horror/dark fantasy with some surreal and lbgtq/coming of age thrown in. Or as I described it once, “cannibal schoolgirls.” (Not really…well kinda?)
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Sandpaperdaisy Art 
How do you do your lettering? I did mine in Photoshop, but in the Kindle Creator, and on the device itself, it appears grainy. Is it a resolution thing or do I have to chase down a copy of Illustrator?
I did mine in Photoshop as well, for this particular comic. Manga Studio may be a cheap alternative to Illustrator, I think it’s around $40~$50 if you get the normal copy, which still includes support for 3D objects and other handy things. But it does vector inking and lettering too and has different export methods including one designed to give you crisper text. It’s what I use to finish my comic pages these days.