In addition to the 51 companies chosen in advance to demo at TechCrunch's annual conference, 120 more companies (note 1) are in the DemoPit. The DemoPit is an area outside the main hall where the companies that didn't make the final cut to be on stage have a table where they can showcase their companies to attendees. And one lucky company, the one that collects the most tokens from attendees, will appear as company number 52 on stage in the last session tomorrow.

There were several financial services companies in the DemoPit Monday including Billeo, Expensify, and LoanKrunch. Today, there was just one, Rate Surfer from My Best Interest. Although the service will not go live until its debut at Finovate next month, the company today showed it to the public for the first time. It also added a downloadable demo program to its website if you want a sneak peek (note 2).

What it does
Rate Surfer is a credit card manager. It uses account-aggregation technology to import balance and rate data from all your credit cards. It then uses that data to help users initiate and track credit card balance transfers across their credit cards. Although not without rough edges still to work out, it could potentially save users hundreds of dollars in interest every year by helping them take advantage of transfer opportunities.

Main Rate Surfer page from its demo software (9 Sep 2008) 

Notes:
1. There are 120 total companies, but each gets just a 12-hour day in the DemoPit, so there are 40 companies each day. Although, the Monday companies were given an extra day due to a wifi outage that plagued the hall much of Monday. In addition to these companies, there were 33 exhibitor tables and 22 TechCrunch alumni with tables, including Cake Financial and last year's winner Mint.

2. It's a 67MB download.