While Project Management / Collaboration web apps are nothing new, TeamLab stood out for me for a reason that it highlighted 2 relatively new trends in SaaS:
1. Data Migration (this is a good sign that the market is maturing and new entrants are recognizing alternative solutions exist and those customers are the ones they want to woo first)
2. Self-hosting option. Call it private cloud version, call it open source - either way it does two things for the customer - it allows them to keep the app and more importantly the data in house and second, it creates a level of transparency by allowing the prospective customer to see the quality of code before they make their decision.
Aside from these two trends, TeamLab seems to be a capable PM/Team Collaboration Solution, alternative to the BaseCamp, Central Desktop, and many others.