I would just like maybe a white background available or even a darker blue. It really is hard to look at.

So far I'm loving Project Bubble... and I appreciate the simplicity. A simple expense tracking would really bring this service full circle and allow freelancers to take care of most - if not all - all of their BASIC accounting needs. Maybe a simple Income vs. Expense report as well.

collaborators should be able to add their own tasks to a project and manage them (create new projects, tasks, todo).
seems something very obvious if you have a 2-3 person company/project.

I'd like to be able to install on my server. I also work with some companies where they aren't allowed to post data on other peoples servers for security reasons.

When you schedule tasks, it would be useful to feed to ical or google calendar etc so we can set up alerts and keep our schedule in order.

this would be great! I have a meeting with a client tomorrow to sit down and go over the itemized estimate and initial payment required...it would be fantastic to be able to sit down with an iPad and review that with them.

I'd think that it would be amazing if there is a possibility to change the invoice-design.

Would be helpful for those of us who don't exactly like using Paypal. :)

There should be a way to assign a task to a contact or collaborator or group or client.

When are you planning to release the API? Will it support interaction with desktop applications? I would love some desktop application ex. based on adobe air platform which will show basic info, it could run timers or post to-does.

Allow for billing of not just time but quantity items, ie,

Item Quantity/Hours Cost

* A good feature for both people who invoice by quantity delivered or have flat rate per product/service.

Add support for Kenya Shilling (KES)

even if the project is defined as "ongoing"

Projects that have been invoiced are set to a status and then if paid can be set to a 'paid' status - this would simply keep the lists more segmented

I do multiple small projects for clients and wouldlike the ability to dd all those projects to one invoice -

A gant chart with all the tasks and to dos on it would be a good addition to what is a great program :-)

How about integration with twitter in terms of real time collaboration, client discussion and deal hunting. People will love this and this could really make your app go viral.