I would be remiss if I didn't mention TASCAM's US-322 and US-366 interfaces. As TASCAM and Cakewalk are both part of Gibson there is definitely self-interest at play. However, when I needed an interface for seminars I requested a US-366 to evaluate, and was very impressed. It's now what I'm using with my laptop (for my home studio, I'm still using the V-Studio).
What I like about it:
Mic pres. There are two combo jack (XLR mic/TRS line) inputs and they can both handle phantom power. The circuitry is discrete, not op amps, and the frequency response extends to 60kHz.
SPDIF digital I/O. Both optical and coaxial (US-366 only - see below).
The high-Z input for guitar is 1 Megohm so there's virtually no loading.
Very solid construction and compact size. I take it on the road, so both matter.
Onboard DSP. Compression, de-esser, reverb, and EQ as well as a mixer. The main use is for situations where, for example, the singer wants to hear the voice with some reverb while recording. One seemingly minor but very cool feature is that there's a button you hit to show/hide the DSP and mixer applications on-screen - you don't have to root around in a programs menu or find a shortcut.
Headphone amp. This is subjective, but it sounds better than average to me.
Inputs are on the front. A small point, but it leads to a neater setup.
Limitations:
No MIDI in or out. Granted most MIDI these days uses USB, but if you have devices with 5-pin DIN MIDI connectors, you'll need a separate MIDI interface.
Doesn't play nice with ASIO4ALL. Having ASIO4ALL installed on your computer interferes with TASCAM's drivers (which are far better for ASIO anyway, so I don't see any advantage to having ASIO4ALL installed).
You can't enable phantom power for each input individually. To be fair, virtually all relatively low-cost interfaces work similarly.
Only one headphone jack. If you're engineering someone who wants to monitor what they're doing, you'll need to connect a headphone amp to a line out.
The main difference between the -366 and -322, aside from $50 ($200 MSRP vs. $150 MSRP, respectively) is that the -322's maximum sample rate is 96kHz and there's no digital I/O. The -366 has optical and coaxial SPDIF I/O and handles sample rates up to 192kHz.
The interface market is quite competitive, and there are lots of options at reasonable prices. TASCAM interfaces had never really been on my radar until I joined Gibson, but I have to say the US-322 and -366 are very well engineered and sound excellent. And of course, going forward the drivers will always be tested thoroughly with Sonar.