Currently only ASSOB are licensed to offer pre-IPO shares, and even then it is limited to sophisticated investors. The legislation hasn't changed for equity but debt crowd-funding is already on the cards. The recent financial review hinted at change or more precisely relaxation of the existing regulations. If you are really really desperate to be the early worm, set up a NZ company (which does have crowd investing ... see Snowball Effect, etc) and use the Mutual recognition provisions of the trans-Tasman agreement. In the US, the Title III of the Jobs Act came into effect a few months back in May and there are 10 platforms. However, the vetting process (if it follows NZ standards) will be slow though they automate the SEC reporting.
The problem is that most startups are not investable propositions