Idea for CodeCanyon item

Hello there,

i have idea for good CodeCanyon item - website application for project management (like Basecamp, Asana, etc).
You can see Czech version na URI

I could translate it to english and put as standalone script - its ready to offer for third party users for cash.

Give me some feedback please, if it would be wanted or not. Its designed for simple use.

In cube it has this function list:

    • After registration the user has 21 days free premium, then he can decide
    • admin panel for owner with stats and premium extending
    • managing projects
    • managing clients with address and stats
    • statistics
    • calendar
    • work with team
    • discussion in projects
    • notes, prices, deadlines in project
    • attachments in project

Thank you for your opinion.