I look forward to seeing your new logo. I think the coffee cup design is good and it will stand the test of time but I agree with the designer on the comic sans like font. Something with a bit of flow and curves that matches the cup or maybe one that is distinctly different - we will see :-)
I see its (R). Good. It also means you need to defend and protect it from copiers, otherwise you can lose the trademark. A few letters to Aussie infringers? IANAL :-) Not much one can do with OS infringers. I wonder if you change the font do you need to re-register the design? Lots there for trademark experts.