That RCA200 sounds pretty cool, how long have you had it? I assume you have to setup a separate account for it, vs the G1? I know nothing about that RCA200. Does it refresh like other radios or does it just play like the web player?
For $99 the RCA "RIR200" (I've been saying that wrong) is quite nice, actually - I got it for Christmas. It visually isn't too pretty (looks like it's a retro '80's design) and it's meant to be used as an alarm clock so there's no remote - that's the biggest downfall. It's an "alarm clock" with WiFi, Slacker support (yes, you can wake up with Slacker), and WMA, MP3 and Real (people still use that?) playback - over 12,000 internet streams. All configurable via a webpage where you can add your own streams. Entering your zip, it has 3-day weather forecast with emergency alerts and finds all local radio station's streams automatically. It also can record internet streams (no scheduled recording though) to it's 512MB of memory and plays MP3's from the USB port (which unfortunately is in back). Oh yea and don't forget the (humorously poorly working) AM/FM tuner!
I don't need a separate account because it doesn't have a device ID like a portable would - it logs in and appears on Slacker's end exactly like a PC accessing their servers. It functions the same as using Slacker via a Squeezebox device. It has ban and heart buttons on the front and unlike the portable I can "unheart" a track. If I was on the computer and listened to the Comedy channel and then Alternative Hits those will show up as recently played on the RIR200. Both logged in at the same time will cause problems though - at first I'll lose unlimited skip (even though it's a Plus account) and eventually it will stop working. There is no way to access any saved songs at all, it just streams Slacker stations. I'm using it with a Denon amp via the headphone / line-out, but the built-in speakers are pretty good for the size; there's even two cute little speaker ports in the back!
In my opinion other than size the G1 is almost on par with the G2 now.
The only difference is the song volume issue; which is present on the web player, the RCA RIR200 and the Slacker G1. The G2 can normalize at a hardware level. There have been noticeable improvements on Slacker's part and IMO this problem can and should be handled 100% on Slacker's end. Because of the way Slacker is (i.e. like listening to a CD vs compressed FM radio), we're always going to have texture and equalization differences from album to album. But there's no reason why they can't set an average peak volume for every file without that FM-style compression. So songs will still have their louder and quieter moments, but every song's average volume would be about the same. This could be implemented by Slacker without recoding as well, it's a matter of shifting a few bits and nothing more. It's something that really needs to be done to help push the service forward. Having to jump on the volume quickly because a song comes on from a "loud" album is annoying and not necessary with XM/Sirius/AM/FM (well maybe commercials).