We're shortly about to launch a tool for investors to collate all their knowledge about startups in one place. Xenapto will do all the hard work of keeping you up-to-date with your current portfolio companies and your longlist of potential investment targets. We'll also help you form ad hoc syndicates of fellow investors to discuss and take part in funding rounds either collectively or as individuals. All this without the effort of scanning news sources and all the usual discussion channels (we'll incorporate your AngelList interactions into the flow, for example).
This product is aimed at getting us some traction and a user base from which to rapidly develop our more advanced features, for example a full-featured portfolio manager for early-stage investors to maximise their returns and ensure that capital is available when it's needed. What's wrong with my spreadsheet you say? If you're happy with a static snapshot of your portfolio, updated manually, then go right ahead and keep it.