Standard economic theory states that during financial crises, investors exhibit a "flight from risk" behaviour; certainly, one can imagine institutional investors pulling their money out of hedge and venture capital funds. However, this crisis also has the US Federal Reserve aggressively cutting interest rates, with the effect that capital becomes cheaper, given a fixed risk premium.

My guess is that venture capital will become harder to find, while companies which are profitable but need capital in order to grow (e.g., to buy more servers) will find that loans are cheaper. Seed funding probably won't be affected at all -- money for that generally comes from people who believe in what they're doing (and are seeking, in part, a non-financial payoff) rather than people or organizations which are trying to maximize their profits.