I received my new tx2500 this monday and have been playing around with it ever since. Since I couldn't really find a very thorough review on the heat it produces in real-world situations, I thought I might share for anyone curious. I didn't include any temperature readings since I'm not sure any programs are accurate right now for the Puma platform. Brief specs overview: ZM-86 @ 2.4 Ghz 2 GB ram 320 GB HDD ABGN Broadcom Wireless BT & FP reader 8-cell battery I've heard plenty of horror stories about tx2000 heat production, and have read that the tx2500 is roughly the same (with perhaps a minor decrease). However, my experience has been far more pleasant than I expected. Based on other reviews, I was afraid that I might end up burning myself (or at least feel very uncomfortable) in tablet mode due to the right-side vent on the back. However, running the laptop on slightly modified of the HP recommended settings (processor capped at 50% & brightness at 40%), the temperature on the bottom is roughly the same as the right-side palm rest - both of which are lukewarm or warm at worst. The fan is always on its lowest setting, and I can only hear it if I hold laptop a few inches away. Furthermore, my laptop is on my bed (a soft, insulating surface that causes poor ventilation), and I have been running iTunes, AIM, and Firefox (obviously with wifi on) for the past 2.5 hrs, keeping my cpu usage at roughly 30% the entire time. The keyboard of my 17" laptop under moderate usage gets warmer than the bottom of my tx2500. Note that I also have the ZM-86 processor, which is about as bad as it can get. The temperature is even lower if I hold it up in tablet mode rather than rest it on my bed. Overall, the temperatures are well within comfort range, and this is in a worse scenario than at a classroom taking notes. I would not have iTunes running, and the laptop would be either be located on a hard surface or in my arms. Furthermore, room temperatures would be considerably lower considering it is now in the middle of summer (it was about 70-75 deg F, night time, when I wrote this review). All in all, with slightly tweaked settings, I am very pleased with the heat production. When in battery mode, it has never gotten warm enough to be uncomfortable to use (after I capped it at 50%). High performance mode is a whole different story, however. When running Warcraft III, a moderately graphics-intensive game, the fan almost always runs on high, and the vent blows out very warm air. The vent itself gets rather hot, though perhaps not quite enough to burn (it is close, though). It is far less comfortable to hold the laptop in tablet form while running in High Performance mode, although it is still reasonably warm unless running processor/graphics applications. Unless using the tx2500 on a desk (the bottom got very hot when using it on a bed), I would strongly recommend against using high performance mode. However, since I only plan on taking notes or watching movies in tablet mode, this does not present a problem to me. Even with the processor capped at 50%, I was able to run a 720p HD file encoded in x264/AAC (probably the most processor-intensive commonly used codecs) without any lag or stuttering. A 1080p x264/AAC file was not really watchable, however, even when set to high or realtime priority (600 MB, 22 minutes). These tests were done with Windows file sharing over a wifi network, however, so actual performance is probably slightly better. Hmm.... I guess that's all I can think of for now. In case your wondering, it has been 3 hrs since I turned my computer on, and I have about 10% battery life remaining on my 8-cell battery. Since I only started at 95%, I estimate a ~3-3.5 hr battery life with 50% cap & 40% brightness. Considering I'm still running iTunes, AIM, and Firefox, and I haven't yet turned off unnecessary Vista services, I'd say the battery life is quite decent. Once (if?) RMClock gets support for the Puma platform, we might be able to expect an extra 10-15 minutes. I wonder if a 3.75 hr balanced setting is possible. EDIT: Oh, one last random fact. In case your wondering, standby drain is roughly 1% per hour on the 8-cell battery. After a full charge, I left it in standby until I got back from work (a little over 8 hours later). The battery monitor gave a reading of 90%. Hope that helps!!