Anticipate an ownable trend such as content curation (Scoop.it).
If Haiku Deck solves a problem (how to use the creative commons) Scoop.it and Paper.li are surfing an ownable trend - content curation.
When these tools launched the Google trends line for "content curation" was pointing north, but the speed and steepness of the subsequent adoption owes much to the intensity ADDED by these new tools.
Today a successful SaaS MUST create its own community even if most of its cash is B2B. B2B without community is a nonstarter because its too exposed. B2B without community is too costly to promote and can't take a direct hit.
ZipCar mashes up scaled systems like Facebook, LinkedIn, Twitter combined with a mobile app, website and a creative business model to scale without traditional advertising and at a fraction of what a similar idea / model would have cost 10 years ago thanks to the ability to used APIs and other "scaled systems".
Tools are natural community creators. Early users like to trade notes and recruit friends.
The phone is worthless unless your friends use it too, thus Metcalfe's Law: value of a telecom network is square its (M)members.
Not unusual to apply Metcalfe to social nets and scaling SaaS. The tool must create an increasingly competitive (and so intelligent) community reinforcing itself where every costs of new member acquisition goes down as current members recruit in order to protect THEIR investment in the scaling community.
The Haiku Deck Gallery is a great example of a rapidly scaling, diversifying and increasingly competitive community. Haiku Deck is getting much higher return for less and less work as burden shifts from the Haiku Deck team to vested community members.
Where once a handful of team members curated this gallery now an algorithm plays gatekeeper and scale is faster and faster, better and better.
One thing I've noticed about mashups is they will mashup any and everything. ZipCar is agnostic about WHAT they mashup. GOOD = any mashup capable of helping them scale, lowering their acquisition costs and helping to create community.
I think ZipCar is missing a HUGE opportunity to band their users together in a forum-like environment. What will a ZipCar user do if they share a story? Push social to that post.
Your tool is worth square the members. Why? Easy to see why when you think of your phone. If you were the only one with a phone it is worthless.
When every member of your network has a phone its priceless. Tools that create community count on the tipping point where the community becomes so valuable its members protect it with increasing investments of time and advocacy.
When people are "Scooping" and "HaikuDecking" things the distance to a safe scale is closer. In a digital age SaaS developers can't take their eye off the ball and relax since even large developments like Facebook can dry up and blow away fast (can you MySpace?)
Now with the big injection of rocket fuel your SaaS and community are off to the races. The positive virtual cycle is set, and efficiency increasing.
Wobbles happen (competitors, members begin to lose interest and reduce advocacy or other unpredictable factors), but the good news is a larger wobble is required to push a speeding scaling train off the tracks.