Regarding the mention of the DSO Nano v2, I own one of those. With the latest "BenF" firmware, it's a pretty awesome little device for what it is (and what it cost), especially for those of us with very little bench space to spare; but, recognize the limitations (which it sounds like you have: 1MHz, single input, etc). If you're at even remotely considering it, you might want to save a your pennies and hold out for the DSO Quad to become a little more "production-ready"; it looks to be a significant improvement over the original two Nano designs.
It apparently uses a buffer circuit between the probes and the sound card of a Linux PC or laptop. I think this might be my next small project, if I can figure out why it won't build against a recent version of GTK+...
Downside: really low sample bandwidth (it's a sound card, after all).
I often find him entertaining although the voice is annoying.
I disagree purely because we need more interest in lower end cheaper hobby o'scopes in order to force the low end real o'scopes to lower their prices. This will also cause the hobby o'scopes to continue improving, look at how the DSO Nano has evolved into the DSO Quad.
www.dpscope.com
2 channel scope, display on laptop screen. Easy to assemble.$70 plus shipping, includes 2 probes.
Also nice, & free, is Visual Analyzer from these guys http://www.sillanumsoft.org/
I have used with a microphone to analyze sound, have not made up a 1/8" or 3.5mm jack to plug into my sound card to try that.
By the looks of it, it has a logic analyzer built into it also. I am wanting to get a scope and a logic analyser, so getting something that does both would be brilliant. Question is, is it more economical to get the E and a seperate LA?
I have just emailed off to get pricing from local suppliers, hopefully the come back ok.