We're very excited for the forthcoming launch of Technology Entrepreneurship. We're sorry not to have gotten in touch lately - we've been busy generating lots of content, and the system is working really well. Unfortunately, there are still a few administrative i's to dot and t's to cross. We're still hopeful that we'll go live very soon - we hope not more than a few weeks late.
What do "i's" and "t's" mean in that sentence respectively?