No ETA on the update at the moment, but I'll keep you posted.
1 & 3 - Yeah, you can simply add additional items to the Hops, Grains, Yeast tabs as you have access to them. I need to add the steps to the FAQ on this. Since it's just a spreadsheet you can add any ingredients you like. So if you've got sugars, grains or hops that you use which are not there, you can insert them into the Grains, Hops or Yeast tabs. The easiest way to do this is find the row where you want to insert it, then hit Shift-Space (to select the whole row), then hit Ctrl-Shift-+ (control-shift-plus) which will insert a new row at that spot. Then you can fill in all the relevant details.
2 - I'll try to make all the units configurable, including SRM & EBC.
As I get some changes implented, I'll include you on some testing. Thanks. And yeah, if there are any functions missing from spreadsheets that you also use, let me know and I will try to include them. That was my original goal when I started making this for myself, I wanted to stop using multiple tools and put everything in one. I think some of those functions are already in the Calculators tab, like the Electrical Heating, there is the "Dilution" calculator, which I should just make a generic mixing formula calculator since it's the same formula for temps, gravities, etc. But definitely let me know what tools are missing that should be included there. I'll hit you up on email too.
WBA is the World Brewing Academy. Check this out:
http://dieseldrafts.com/journal/category/siebel/I still have a lot of photos and stories to sort and post.
its a pity i only have access to the latest version of Office at work 
How is the open office version progressing?