It is so nice to hear that "In your pocket" guide about Warsaw is free both downloading from Internet and in paper form. Online version you could download at http://www.inyourpocket.com
If you are interested in paper version, you could take it free at Tourism information center or at upper class hotels.
I got also "Warsaw in short" guide, here I liked that sightseeing is based on different routes as "The Royal Route", "Warsaw's Praga" and others. It is free at TIC as well.
On my second visit to Warsaw, which was already my 6th visit of Poland, I felt the need to buy a good guide book, as this trip also covered some smaller Polish cities.
So I finally decided to get myself "The Rough Guide to Poland - 7th edition". It includes 60 pages about Warsaw and the surounding region.
I found the guide quite handy for this trip as it offers many practical tips for independent travels.
Rough Guides: http://www.roughguides.com/
I must admit that I am a huge fan of the "In Your Pocket" guides. They are usually an excellent resource for information about travels to Eastern or Central European cities.
I got my first Warsaw "In Your Pocket" guide in 2004 directly at the airport. In 2010 we got the guide from the Tourist Information Office in the old town. The price is 5 Zloty but if you are lucky you might even get a complimentary copy. The guides can also downloaded free of charge from the "In Your Pocket" website.
It not only provides helpful information about transport, accomodation and sights, but also many off the beaten path tips and background information. Apart from that the guide is usually entertaining to read.
Do not forget to get the free guide: Warsaw Inyourpocket. This useful guide is updated each month so you will be always In with numerous addresses and reviews, tips about, hotels, restaurants (excellent reviews!), bars, cafés, clubs, sightseeing, shops and maps.
You could download the summary of the guide a home as pdf format. You will get the full version guide from your hotel or the tourist information center.
"What's up in Warsaw" is a free monthy published brochure with all kinds of useful information for travellers and business people. Among other things it offers information on cultural and social events in Warsaw.
The brochure is available at the tourist information centres, many hotels and various other places all around the town.