It does depend on many other factors like if you owe money to student loans, back taxes or child support and whether you made more than $75k if you file as single or $150k if you file a joint return. But yes under most circumstances you should get $300 for your daughter if you claimed her as your dependent on your 2007 tax return.
If you are curious about how much you will get, you can use this stimulus calculator as long as you have a copy of the tax return you filed:
http://www.irs.gov/app/espc/





