Using CyanogenMod7 build and running low internal storage space? S2E (simple2ext) is here to rescue you (I mean your phone internal storage). Basically, S2E is app2sd for CyanogenMod7. There are 4 parts that you can move to SD card ~ applications, private apps, Dalvik cache and download cache. Select anyone of them that you want to move to sd-ext partition at SD card. I tested it on TyphooN CyanogenMod 7 NAND Android RAM Zip ROM for HTC HD2. And turned out successfully.
Install S2E. Select what you want to move. Then reboot your phone. First time reboot loading is going to take sometimes as S2E needs to move your existing installed applications to SD card. After finished moving, you should get something like below on your SD card.
Download S2E (simple2ext) at Android Market here.