Although I won't invest much there.
Btw...I found most ppl saying abt the electric rate, what if free?
coz I just planned to mine in my office...lol
I once tought about mining @ the office to, untill somebody pointed out that you can actually get fired if your employer finds out. Now, i make a lot more in my daytime job than i can ever make while mining, so i decided i wouldn't do it...
In case you do decide to mine in the office: it's possible to make some cash, but don't expect much (with a decent office PC, you can earn a couple dollars per week, if you mine the correct ALTcoin)
so I may just keep my bitcoin jobs, but it really really slow...