Getting nice looking formulas in your presentations / posters is always a problem. Latex is great at producing nice looking formulas and text, but for presentations and posters it's not really equipped. You could however write your formulas in a latex document, then import the pdf into inkscape.
Some builds of Mendeley had a bug on KDE systems though: you couldn't open a pdf in an external viewer, which is rather annoying because the internal one is rather limited.
We wanted to have a code repository that can be browsed from the web. We have chosen to install open source gitorious: http://www.gitorious.org. Unfortunately there are no ready made packages, nor is there an extensive amount of documentation on how to get it running.
Latex is a very powerful typesetting application. A powerful package to be used with this is pgfplots, which allows you to render your plots using the latex engine. Unfortunately the default latex settings assume you're running latex on an ancient 20 MHz 486 with less ram than your average mobile phone. This is ok if you're just asking it to process text, but if you're using pgfplots it will run out of memory trying to draw your images.
It's always a dilemma: latex is great for formulas but well, not so much at making slideshows or posters. Powerpoint on the other hand is great at the latter, but sucks balls at the first. No matter which tool you use to create your powerpoint, a lot of frustration, broken coffee mugs and hairloss ensues. Wouldn't it be great if you could just typeset formulas in powerpoint using latex?