Keep your shirt on!
Dear everybody, I really hate to say this, but:
I have a Mini Core Solo, completely stock. Bluetooth reception on the thing is crappy at best... even one of those "100 feet range" BT dongles didn't really help, I almost need to place my apple BT keyboard/mouse on top of the Mini!
But, on the wifi topic, I have just erased and reinstalled OS X on it and to resolve my wifi problems (connection is slow, and very low/jumpy bars, jumpy pings, i.e. 2-3ms to 3-400ms between mini and powerbook, but works, does NOT disconnect. It also looses network after restart, though not after sleeping.). Reinstall did nothing.
I also noted that I have firmware 0.1.16 (after reinstall, didn't check before reinstall)
My Hi-res 15" PB is rock-solid.
On a side note, sharing my (wi-fi) internet over the mini through ethernet connected to a Airport Express produced excellent file/internet-transfer between my mini and pb (note: internet on my mini works at approximately 80-90% capacity)
Wireless Card Type: AirPort Extreme (0x168C, 0x86)
Wireless Card Locale: Worldwide
Wireless Card Firmware Version; 0.1.16
Wireless Channel: 7
I sencerely hope that this helps in some way!
Regards, Malte Eriksen