[paulodeon]

We're building a software tool that lets you create HTML emails visually without worrying about client specific rendering bugs like this.

It's due to launch in the next month. If you're interested email [e-mail] and I'll add you to the list to be notified when we launch!

[mjaniczek]

After working on crafting such emails for a while for my previous employer, I was seriously considering starting a SaaS to do exactly what you just described. (I didn't start.) Best of luck!