Like these?

http://bittask.com/

http://www.bitcoinjobs.com/

I just found these by a quick google. I don't know how solid things like this are yet. But... it's interesting.

I've been mining on:
http://feathercoin.is-a-geek.com/
for a week or so now and have been paid throughout.

I had a 7970 for a day, trying to get it to work. No matter what I tried, I could not get it above 600 khs (scrypt for LTC). So you're already doing better than I managed. I'm wondering if it's a motherboard or software or some other thing. There are a lot of settings on cgminer to tweak, so if you've only tried default so far... give it a try. There are guides around for tweaking it. I was doing scrypt and read the script-readme in the cgminer distribution. There are some good threads here for optimizing, too.

I found this topic:
https://bitcointalk.org/index.php?topic=71366.40

It appears someone is doing it. I don't have a dedicated mining rig, just using my desktop. I figure I might as well use everything I have rather than let it sit idle (computer is running anyway).

I just updated the driver for the Intel HD 4000. Running cgminer -n, I get the output below. It's apparently getting an error trying to get the device ID of the intel GPU. Any ideas on how to get it working?

 [2013-04-22 06:02:05] CL Platform 0 vendor: Intel(R) Corporation
 [2013-04-22 06:02:05] CL Platform 0 name: Intel(R) OpenCL
 [2013-04-22 06:02:05] CL Platform 0 version: OpenCL 1.2
 [2013-04-22 06:02:05] Error -1: Getting Device IDs (num)
 [2013-04-22 06:02:05] CL Platform 1 vendor: NVIDIA Corporation
 [2013-04-22 06:02:05] CL Platform 1 name: NVIDIA CUDA
 [2013-04-22 06:02:05] CL Platform 1 version: OpenCL 1.1 CUDA 4.2.1
 [2013-04-22 06:02:05] Platform 1 devices: 1
 [2013-04-22 06:02:05]  0       GeForce GTX 670
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] Failed to ADL_Adapter_ID_Get. Error -1
 [2013-04-22 06:02:05] ADL found less devices than opencl!
 [2013-04-22 06:02:05] There is possibly more than one display attached to a GPU
 [2013-04-22 06:02:05] Use the gpu map feature to reliably map OpenCL to ADL
 [2013-04-22 06:02:05] WARNING: Number of OpenCL and ADL devices did not match!
 [2013-04-22 06:02:05] Hardware monitoring may NOT match up with devices!
 [2013-04-22 06:02:05] 1 GPU devices max detected
 [2013-04-22 06:02:05] USB all: found 6 devices - listing known devices
 [2013-04-22 06:02:05] No known USB devices

Yes, mining LTC (thus the --scrypt in the setting).

I'm using these settings on my 7970:
cgminer.exe -w 256 --thread-concurrency 28672 --gpu-engine 1120 --gpu-memclock 1780 -I 13 --auto-fan --scrypt

and I get 600 khs. I've tried all sorts of combinations. Is that really the best it can do or am I missing something?

I would really like some help. I've been through both guides (SCRYPT-README and a thread on here) I could find and I can't seem to get my 7970 above 600 khs for litecoin mining. I look at the hardware comparison and supposedly people are getting 750 khs even at a far lower clock rate than I'm able to put in. A little frustrating.