Following up with my post about ActiveShopper’s interesting partnerships, are some other interesting ways to shop and compare prices as you go… And the companies that are powering their services.

4INFO
The service enables the search and delivery of real-time information to a mobile device. The have enabled a Price Comparison service which is actually backed by data from Shopping.com. Read more in a blog post here.

411Sync

This is an interesting concept… They have and Open SMS API that allows developers to add their own site to the 411 sync system. Developers can use 411sync SMS (Text Message) Services to offer custom information to the users. Essentially you can make your own web service SMS accessible. Definitely something I will be checking out further.

They have 256 different queries that can be sent to their system to return different information. For shopping, currently, they numerous queries available, such as price comparison from Yahoo! Shopping, NexTag, and MSN Shopping. And also, deals from GottaDeal.com, DealCatcher, and deal of the day from Buy.com.

More details at:
http://www.411sync.com/
sms@411sync.com

Other blog entries, which describe it briefly I found here, and another one with an example here.

It will be interesting to see how these services do as more SmartPhone / PDA technology becomes available.