Many have been talking about Google Labs' latest release, Google Web Accelerator. It promises to reduce wait times when web browsing mostly by a combination of caching and pre-fetching.
Unfortunately, it appears to have some issues. First, as Nathan Weinberg writes, it appears that Google Web Accelerator is sometimes serving up the wrong cached page, showing you a page with someone other than you logged into site, for example.
Second, as Fons Tuinstra reports, Google Web Accelerator effectively acts like a proxy and, among other things, allows users to bypass China's firewall. While I'm no supporter of that firewall, I suspect China will not be happy about this development. The response is unlikely to be favorable to Google.
Finally, many have pointed out the privacy implications of Google knowing about most pages each user has ever visited anywhere on the web and the full contents of those pages. Google may have earned a lot of trust, but this is a big step, and one that is likely to cause some concern.
But keep the big picture in mind here. Not only is Google providing a free product that can save people time if they choose to use it, but also properly anonymized information about what pages people are visiting could be used by something like TrustRank to help reduce web spam and improve the relevance rank of search results. In the end, Google is helping people find the information they need more quickly and efficiently.
Update: Hmm... I have to say I'm feeling a lot less charitable toward Google Web Accelerator after seeing Jason Fried's post about how Google Web Accelerator can delete data and have other undesirable behaviors. It looks like a lot of sites, including Findory, are going to have to go through the effort of explicitly disabling Google's prefetch. Ugh, what a mess.