Welcome Tim! There's a good chance I'm going solo as well. Unless you count 700 of your closest computernut friends together on one ship as going solo.
As others have said - you really won't be "solo". You'll be with 700 of your closest friends. Many (most?) of whom you haven't yet met, but will be your best friends after the cruise is over.
Hope you'll add on a couple of WDW days at the end of the cruise so you can also join us for DATW.
I'm going solo and proud of it! I have traveled solo before and met many wonderful people. I actually met a family from England that I am still in contact with. Even if you are shy (I am pretty shy around new people), there will be a Diser who will make you talk to them As many others have said, you can have alone time when you need it and be in a group when you are feeling frisky Welcome aboard whenever you decide!