I had no end of trouble with 2.7rc2, especially the wireless, on my Acer Aspire One netbook. Until I powered the thing off, counted to 0xA, and rebooted from scratch. Then everything worked! Google says this is a known feature of the Atheros wireless chips: if they get confused (I'm not sure how), nothing but a nice power-off nap will make them perform as expected. This is the kind of loopy undocumented experience that may help somebody else, so I mention it here.
Also, I wanted to get in on the general celebration of TinyCore and how sweet it is. I have four thin clients (2 home-made, 2 rescued from Windows) running pretty minimal TC. Each one is always on and getting lots of use. Not to mention my peppy, instant-on, bloat-free netbook now running the latest release candidate. Hearty thanks and warm greetings to Robert and Team TC!