Being able to connect through Second Life, outside of having to download and run a resource intensive program has been a wish of many SLers. SLim helps alleviate this, for those on the go Sparkle IM seems to fill another niche.
For those who want to keep in touch with SL on your iPhone, Genkii has just released a new app for the iPhone that lets you IM your Second Life or OpenSim friends and contacts (along with some other nice features). It’s an interesting concept, especially the direction that Genkii is going through. The benefit is this app allows for a new means of communication for those who need to stay in touch (if you have an iPhone that is!)