There's a few out there who weren't completely ready to tar and feather LW #1 just yet.
I've got a 2-year-old myself now, so I'm also going through this a bit (also a full-time working lady with SAH husband.)
2-year-olds are difficult to deal with, but there's a lot of good parts to it, too. I love it that my son now notices when I'm gone and he always gets really excited and runs to the window when I come home from work--it's really become the highlight of my day!
As far as what to do with him, I haven't found that it's that hard to have fun with him. He likes his Legos and we build stuff together, and sometimes I'll get out a big pad of newsprint so we can draw. (Personally, I think it is possible for a toddler to entertain an adult--at least mine is endlessly entertaining because he's brilliant and innately gifted, but then I'm a bit biased : )
Kids also get better with entertaining themselves as they get older, so it's not like you have to be right there "stimulating" them all the time.
I also usually take him out with me on the weekend to run errands. He seems to have fun with that, and it gives my husband a break, too.
It doesn't have to be a major chore if you don't let it become one!