I can guarantee that you can run your apps on dotCloud on roughly the same budget as Heroku, if not cheaper. Our pricing page is tragically bad, we know it, and we are fixing it. For now a large proportion of our sales process is custom, in mostly 2 ways: 1) "I have several tiny apps, help me pay less"! and 2) "I need VIP support and features, help me pay more". This will soon make its way into official pricing. For now you should email support@dotcloud.com and mention you come from ep.io :)
This may sound unglamorous, but that is how our discovery process works, and it's allowing us to build a real business. And in the long run you need a business in order to avoid selling out and letting your customers down.