Is there a 'theurge'-class for druid/clerics?

[Sejs]

Is there a good way to make a character with both decent druidic and clerical spellcasting?

Not really. Not officially.

The Ultimate Magus was a pretty recent addition, mind you. And even then it's mixing two more disseperate elements of spontaneous versus prepared spellcasting.

I wouldn't be supprised to see something like that for Clr/Dru in Complete Champion, however.

 

[Sound of Azure]

That would create... CaDzilla!

Engineer/Designer?

 

[moritheil]

Engineer/Designer?

No, that's AutoCADzilla.

I don't really know why one would want to multiclass druid/cleric beyond a 1-level dip to pick up the spontaneous casting ability of the other class. Or domains.