Wirelessly posted (iPhone 4 (32GB, JB): Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7)
No. But Address Book entries are registered in the dictionary. So you could, for example, make an entry called firstname: WinterBoard lastname: MobileSubstrate company: Cydia and it would auto-correct (with mixed caps!) all of those words. Like my phone just did.
Wirelessly posted (iPhone 4 (32GB, JB): Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7)