Simple, formerly BankSimple, will begin accepting consumers waiting on an invitation list for “a long time” in the spring 2012.

In a letter to consumers on the list, Josh Reich, CEO of Simple, wrote that the process of signing up consumers began at Simple on Nov. 8, and is continuing apace. 

We have begun sending out invites, currently a few dozen at a time, and then we will escalate from there. If that seems a bit slow, it is deliberate. To get ready for a wider release, we are beginning with the core features of spending and depositing, and looking to our first customers for feedback before releasing the full product. We’ve been using the full product internally for a few months, but Simple presents key departures from how banking typically works and we want to make sure that you all love it as much as we do.

Simple did not specify how many invitations it will distribute.

Simple can be found online at www.simple.com.