Legal Issues when joining an Incubator?

Your first step should be to identify what is your intangible that is worthwhile protecting? Is it fear of someone stealing the copyrighted code? Do you have a patent that you are intending to apply for? What trade secrets are really secrets? Until you given it some thought, you cannot ask for meaningful advice and any incubator will have the network of service providers to tap.

Absolutely. It is important to get a fair deal, and protect your business and intellectual property. The incubator wants to protect its interests, and get a return on their investment. A good software attorney will advise you privately, and allow the underlying deal to go through. It's difficult to tell you what specific measures you should take without knowing what type of IP you are working with (other than registering copyrights and trademarks on time). So, please talk with an attorney who understands your business BEFORE you sign anything. When it comes to life rafts, bulletproof vests, and legal advice - spend the money. You'll be glad you did.