Reserve the right to re-use your work. Unless you have your client's consent, remove any information that identifies your client before you re-use the work. Strategic alliances are collaborative business relationships, sometimes between former competitors, that seek to deliver a broader range of products or services. The best policy is to try out the working relationship before you commit to a joint venture. Work together on a couple of projects first before you form an alliance.
Strategic alliances are easier to start than end.
The general rule is that if you and your alliance partner cannot agree on how to spend money and make decisions, a formal agreement will not work. The Internet presents the opportunity of doing business better, faster, and cheaper. But business rules are unclear. The basic principles of contracts suggest that terms should be clear, and everyone should have a chance to review before committing to terms. A letter of intent may be used - a bare bones agreement that is subject to a later, more complex, formal agreement.