Bills and New Legislation
The Delaware General Assembly has a bill tracking service where you can search for bills back to 1998.
Search tip: Delaware bills are always titled "AN ACT TO AMEND TITLE ..." so if you want bills that make changes to Title 8 just do a keyword search for "title 8".
The state also has a Notification Service where you can register to receive legislative updates by email.
General Corporation Law
The Delaware General Corporation Law can be found in Title 8 of the Delaware Code. There are several places to find Delaware statutes including a free version on the state's website and several commercial vendors.
Other Business Entities
Statutes governing other business entities (partnerships, limited liability companies, etc.) are found in Title 6 of the Delaware Code.