Mining with low specs? If I have a computer with low specifications (2GB RAM, 2.13 GHz, integrated graphics), is there any way to mine normally with Bitcoin-qt? If not, will joining a pool with these specs be worth the time and effort? What kind of specs are normally recommended for mining?
No, this would not be worth it. CPU mining is extremely slow and there is probably no OpenCL driver for your integrated graphics. You could however hook up FPGAs to that computer, or in the future, bitcoin ASICs.

Currently recommended hardware would be FPGAs and/or fast AMD graphics cards.

In the near future there are several ASIC-based mining devices scheduled for launch. These will drive up the difficulty, making today's FPGAs and AMD GPUs seem slow.