You're sounding good!
Is there anything in between my webcam mike and the snowball though?
You mean in terms of quality?
Well, a webcam mic is a general-purpose vocal mic. It's not designed to give you studio-quality recording. But it's good enough for skyping or recording video snippets playing the uke/guitar or whatever.
The frequency response varies a lot depending on the quality of the mic. Low-end mics tend to pick up higher frequencies more (i.e. they're not good at lower frequency sounds).
Go up in quality and you'll find a more even response across the frequency range, so are good for vocals and drums etc. But then you're getting into the $100-$200 bracket.
The other thing is the 'directionality' of the mic. This is to do with how much you can focus the mic in on one sound source. So if you wanted to record *just* the sound of your uke, and eliminate all other sounds in the room. Or whether you want a mic which records from all directions, so this could be for if you're singing and playing at the same time. Or if there are a number of people playing and you want to record the whole room.
It all really depends on how fussy you are over the quality of the sound. If you start noticing background noise, hiss, frequency response etc. in your recordings then it's time for a better mic.
Go with the webcam / cheapest option to start with, and see if you're happy.